The correct option is A; signal transduction mechanism activated. The transfer of molecular messages from an exterior to an interior of a cell is known as signal transduction, also referred to as cell signaling. To guarantee a suitable response, signals must be effectively transmitted into cells.
Membrane receptors allow signaling molecules to influence cell function without actually entering the cell because they engage with both extracellular signals and molecules present inside the cell. As a general term for molecules that particularly bind to other molecules, "ligand" is frequently used to refer to signaling molecules (such as receptors). The information sent by a ligand is frequently transmitted inside the cell by a series of chemical messengers.
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Full Question ;
the action of any chemical messenger ultimately depends not on the nature of the messenger, but rather on the group of answer choices
A signal transduction mechanism activated.
B nerve cell stimulated.
C organ system activated.
D affinity of the receptor.
E half-life of the messenger.
the total cross sectional area of all of the capillaries in the body is greater than the total cross sectional area of all of the veins in the body. true false
The statement is true. Observe that the capillaries, which have the biggest overall cross-sectional area, have the slowest flow velocity.
Although the cross-sectional area of each capillary is quite small compared to that of the massive aorta, the sum of the cross-sectional areas of all the capillaries is approximately 1,300 times greater than the cross-sectional area of the aorta because there are so many capillaries. Although the cross-sectional area of each capillary is quite small compared to that of the massive aorta, the sum of the cross-sectional areas of all the capillaries is approximately 1,300 times greater than the cross-sectional area of the aorta because there are so many capillaries.
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What are the 4 main functions of the lymphatic vessels?
They include defending your body from pathogens, preserving body fluid balance, absorbing lipids from the digestive tract, and eliminating cellular waste.
What is the role of lymphatic vessels?Lymph system continue to gather and filter lymph as it flows toward large ships called as collecting ducts (at the nodes). These vessels act very much like your veins do, working under very low pressure and with a variety of valves to keep the flow of fluid in one direction.
What are the four lymphatic vessels?Both right lymph duct as well as the thoracic duct are the two lymph arteries in the body. Jugular lymph trunks, clavicle lymph trunks, fuller lymph trunks, & lumbar lymph trunks are the four pair of lymph trunks.
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imagine that you are given some photoheterotrophs to grow for a lab experiment. what should you use as a source of energy for this type of bacteria?
To grow photoheterotrophs in a lab experiment, you would need to provide a light source as the energy source.
Photoheterotrophs are bacteria that use organic compounds as a carbon source, but they require light as a source of energy.
There are different types of light sources that can be used depending on the specific needs of the photoheterotrophic bacteria. For example, some photoheterotrophs may require specific wavelengths of light, such as blue or red light, to carry out photosynthesis. Other photoheterotrophs may be more flexible and able to use a wider range of wavelengths.
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Analyze riley’s karyotype. Pay attention to both chromosome number and chromosome structure
A karyotype is a person's entire set of chromosomes. A laboratory-produced picture of a person's chromosomes separated from an individual cell and placed in numerical order is also referred to as a chromosomal image.
A karyotype can be used to search for chromosomal number or structural problems. A karyotype test examines the chromosomes in your cells to determine: Check to see if you have all 46 chromosomes. Having too many or too few chromosomes can lead to major health, growth, and development issues, such as Down syndrome (extra chromosome 21) and Turner syndrome (missing X chromosome).
The technique compares chromosomal length, centromere positioning (areas where the two chromatids are connected), and the location and size of G-bands. You will submit your work electronically.
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In prokaryotic cells ATP synthase lies across the plasma membrane, while in eukaryotic cells it lies across the_____
In prokaryotic cells ATP synthase lies across the plasma membrane, while in eukaryotic cells it lies across the inner mitochondrial membrane.
The cellular membrane is crossed by ATP synthase, which creates an opening through which protons can pass from regions of high concentration to regions of low concentration, providing energy for the production of ATP. Cells can store energy in ATP for later use thanks to the electrochemical gradient produced by the electron transport chain.The plasma membrane is where ATP synthase is found in prokaryotic cells, whereas the inner mitochondrial membrane is where it is found in eukaryotic cells. The thylakoid membrane, which is found in the cytoplasm of cyanobacteria and the chloroplast of plants, respectively, is shared by all organisms that are capable of photosynthesis.
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what property of biological membranes describes the ability of individual molecules to move within the membrane?A) FluidityB) BilayerC) Phospholipids
Option A, The property of biological membranes that describes the ability of individual molecules to move within the membrane is fluidity.
Membrane fluidity refers to the viscosity of the lipid bilayer of a cell membrane and how easily molecules can move within it. The fluidity of the membrane depends on various factors, such as the length and saturation of the fatty acid chains in the phospholipids, temperature, and the presence of cholesterol. A more fluid membrane allows for greater movement of molecules, while a more rigid membrane restricts movement. This property of fluidity is important for many biological processes, such as the movement of proteins and other molecules within the membrane, signal transduction, and membrane fusion during cell division.
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in which phylogenetic tree are the chytrids and ascomycetes shown as being more distantly related than in the other phylogenetic trees?
Chytrids and ascomycetes are shown in the same phylogenetic tree to be more distantly linked compared to other phylogenetic trees, if that is the case.
How does a phylogenetic tree work and what does it mean?By charting the evolution of an organism from a common ancestor to numerous children, a phylogenetic tree illustrates the relationship between distinct organisms. The links between people in a population to the whole life history of the planet may all be represented by trees.
How is a phylogenetic tree read?Studying a family tree is similar to comprehending a phylogeny. The ancestral bloodline is symbolized by the tree's root, while its offspring are shown by the branches' points. You advance through time by going from root to the tips.
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What is the most important factor for plant growth?
The initial component in plant development is water. It starts the germination process for seeds and exerts pressure on roots to migrate through the soil.
What's the most significant element influencing growth?Temperature: Growth accelerates as the temperature rises. Light: Depending on its length and intensity, light can affect several physiological systems. Plants need a sufficient amount of nourishment in the soil to grow effectively.
What influences a plant's growth?The four main components that affect plant development are sunlight, water, temperature, and micronutrients. These four elements affect how the plant produces its growth hormones, which affects how quickly or slowly it develops.
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Does the skin also contain a deeper layer known as the dermis the epidermis and dermis?
Yes, the dermis, which is the deepest layer, and the epidermis, which is the outermost layer, make up the two main layers of the skin.
What is epidermis?The skin's outermost layer, known as the epidermis, serves as a barrier between the body and the outside world. It is made up of numerous layers of cells, such as keratinocytes, melanocytes, and immune cells, and performs a variety of crucial tasks include controlling body temperature, halting water loss, and guarding against viruses and environmental contaminants. Additionally, the epidermis has tiny blood vessels that nourish and oxygenate skin cells as well as nerve endings that permit the feeling of touch. Depending on elements like sun exposure and mechanical stress, the epidermis' thickness and makeup might change in various body regions.
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A DNA molecule that is produced by combining DNA from different sources or organisms is called
A) marker DNA.
B) polymerase DNA.
Eliminate
C) recombinant DNA.
D) trabscrition DNA
Answer:
C
Explanation:
Recombinant DNA (rDNA) molecules are DNA molecules formed by laboratory methods of genetic recombination (such as molecular cloning) that bring together genetic material from multiple sources, creating sequences that would not otherwise be found in the genome.
biological membranes are said to be selectively permeable (or semi-permeable). what does this term mean, and how does this affect the way that molecules are able to move through cellular membranes?
Selective permeability is a property of biological membranes that only allows certain molecules to enter or exit the cell. This is required so that changes in the environment won't disrupt the cell's internal order.
A biological membrane, also known as a biomembrane or cell membrane, is a selectively permeable membrane that separates a cell's interior from its environment or creates intracellular compartments by serving as a wall between various cell regions. Eukaryotic cell membranes are composed of a phospholipid bilayer that contains embedding, integral, and peripheral proteins that are used for communication as well as chemical and ion transport.
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what can be inferred from observed similarities in the forelimbs of humans, dogs and bats?
From the similarities observed in the forelimbs of humans, dogs and bats, we can conclude that these organisms share a common ancestor.
What is common ancestry and how is it determined?An ancestor shared by two or more descendants is a common ancestor. Common ancestry of two biological siblings includes parents and grandparents. The common ancestors of coyotes and wolves include the first dogs and the first mammals. Common ancestry refers to the fact that different lineages share the same lineage.
Do all humans have a common ancestor?They point out that all humans living today inherited mitochondrial DNA from a common ancestor, the so-called mitochondrial Eve, but this represents only a tiny fraction of our total genetic material.
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the question refers to the table, which compares the percent sequence homology of four different parts of a gene (two introns and two exons) that is found in five different eukaryotic species. the data show the percentage of sequence homology of each intron and exon in comparison to the sequences in species a. % sequence homology species intron i exon i intron vi exon v a 100% 100% 100% 100% b 98% 99% 82% 96% c 98% 99% 89% 96% d 99% 99% 92% 97% e 98% 99% 80% 94% based on the data in the table, which phylogenetic tree is the most likely depiction of the evolutionary relationships among these five species?
Compares the percent sequence homology of four different parts of a gene for this the correct option is d which represent the correct sequence of homology.
compares the percent sequence homology of four different parts of a gene (two introns and two exons) that is found in five different eukaryotic species.
Homology is similarity due to shared ancestry between a pair of structures or genes in different taxa.
The homologies definition refers to a similarity in genetics or structure between two species that implies a common ancestor. There are three main categories of homologies: structural, developmental, and molecular.
Eukaryotes are organisms whose cells contain a nucleus and other membrane-bound organelles. There is a wide range of eukaryotic organisms, including all animals, plants, fungi, and protists, as well as most algae.Eukaryotic organisms include protozoans, algae, fungi, plants, and animals. Some eukaryotic cells are independent, single-celled microorganisms, whereas others are part of multicellular organisms.
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why are natural killer cells considered to be part of the innate immune response?
Natural Killer cells, however, are typically regarded as being part of the innate immune defense since they lack antigen-specific cell surface receptors.
In a phylogenetically old defense mechanism known for its potent cytolytic action against physiologically challenged cells including tumor cells and virus-infected cells, natural killer (NK) cells stand out. Their use in the treatment of hematological cancers may be superior to the well-known T lymphocyte-based immunotherapy in a number of ways.
An antigen-specific
An antigen is considered to have antigenic specificity when the host cells recognize it as a unique molecular entity and can accurately distinguish it from other antigens. The side-chain conformations of the antigen have a significant impact on antigen specificity.
Are antigens particular or general?
Certain immune responses are brought on by antigens. On the surfaces of infections, pathogen-specific antigens are generally present. The immune system responds to an antigen by either producing antibodies, which are specialized proteins, or cells that target the disease specifically.
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the flowering locus c gene, or flc gene, is found in certain plants responsible for flowering. the flc gene is expressed in seedlings, which prevents the plant from flowering. once the temperature drops, the expression of the flc gene drops, and the plants produce flowers. the flc gene is regulated at the epigenetic level. what type of epigenetic modifications are present in seedlings after the temperature drops?
In new seedlings, FLC gene expression is maintained through repressive epigenetic modifications, such as DNA methylation and histone modification.
After cold exposure, these repressive modifications are removed from the FLC gene, allowing the gene to be expressed and the plant to flower. This reduction in repressive modifications is an example of epigenetic regulation, where the regulation of gene expression is controlled by changes in the chromatin structure, rather than changes to the DNA methylation itself. The exact type of modifications present in new seedlings and after cold exposure are dependent on the specific plant species being studied and may vary among species. However, DNA methylation and histone modification are common types of epigenetic modifications that have been implicated in the regulation of the FLC gene in various plant species.
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The complete Question is:
Flowering Locus C (FLC) is a gene that is responsible for flowering in certain plants.
FLC is expressed in new seedlings, which prevents flowering.
Upon exposure to cold temperatures, FLC expression decreases and the plant flowers.
FLC is regulated through epigenetic modifications.
What type of epigenetic modifications are present in new seedlings and after cold exposure?
Which part of the cell contains genetic information.A) Plasma membraneB) NucleusC) ChloroplastD) Mitochondria
Answer: B.) The nucleus
Explanation:
Answer:
B) Nucleus contains genetic information.
Explanation:
The nucleus of a cell is the organelle that contains the genetic information of a cell in the form of DNA (deoxyribonucleic acid). DNA is responsible for transmitting genetic information from one generation of cells to the next and for controlling the function of cells. The nucleus is surrounded by a double membrane called the nuclear envelope, which helps to protect and regulate the genetic material inside. The nucleus also contains other important structures such as chromatin and the nucleolus, which are involved in the regulation of gene expression and the synthesis of ribosomes, respectively.
ALLEN
Name five bacteria that can cause urinary tract infections
There are several microorganisms that can bacteria cause urinary tract infections (UTIs), but Escherichia coli, K. pneumoniae, Proteus s. typhi, Enterococcus faecalis, and Staphylococcus saprophyticus are the most prevalent ones.
Common infections called UTIs occur when germs, frequently from the epidermis or rectum, pass through the urethra & infect the urinary system. The infections may affect several areas of the urinary tract, however the bladder infection is the most prevalent one (cystitis). Most UTIs are brought on by E. coli bacteria, that are gut bacteria. Another name for bladder infections is cystitis. Urinary tract infections (UTI), which has a broader definition, is occasionally used to refer to bladder infections.
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What happens to the chromosomes in late telophase
Answer:
During late telophase, the chromosomes de-condense as the histones assume a relaxed state. When they are in this state the cell can access the chromosomal DNA in order to produce proteins. DNA in the de-condensed state is very difficult to be seen, even with a microscope.
What is the term used to describe published, peer-reviewed scientific articles that are written by the people who did the scientific research?
a.) Second literature
b.) Primary literature
c.) Policy literature
d.) Tertiary literature
b) Primary sources. Reports or articles of original research investigations and experiments carried out by the author themselves that are published in a peer-reviewed publication are referred to as primary literature.
What is the meaning of scientific research?Scientific research is research that is carried out with the intention of advancing science by the methodical gathering, analysis, and evaluation of data—and that, too, in a planned manner. The term "theoretical research" is sometimes used. Basic research is the examination of a natural phenomenon or a topic related to pure science.
What is the characteristics of scientific research?Experimentation is the primary aspect of scientific study. An effective technique to obtain information and use curiosity is through scientific study. In order to explain nature and the qualities of the universe, this research offers scientific data and theories. It enables real-world applications.
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what event occurs as the ribosome shifts down the mrna by a distance of three nucleotides? multiple choice the trna that was in the p site moves into the e site. the trna that was in the e site moves into the p site. the trna that was in the p site moves into the a site. the trna that was in the e site moves into the a site. the trna that was in the a site moves into the e site.
A, P, and E sites on the ribosome are the three locations where tRNAs can fit. As amino acids are delivered during translation, tRNAs pass via these sites (from A to P to E).
Within a protein and RNA-containing structure known as the ribosome, tRNAs bind to mRNAs. The amino acids of tRNAs are joined to the elongating polypeptide chain in a chemical process as they enter slots in the ribosome and bind to codons. In the end, a polypeptide is produced with an amino acid sequence that matches the mRNA's codon structure.
The ribosome's second tRNA binding site is called the P-site (for peptidyl). The second and third binding sites in the ribosome are the E-site (exit) and the A-site (aminoacyl), which are the other two sites.
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differential gene expression is the result of different cells having different . select one: a. regulatory sequences b. genes c. regulatory proteins
Differential gene expression is the result of different cells having different regulatory sequences. Option A is correct.
Differential gene expression refers to the phenomenon where different cells within an organism express different genes, leading to the development of specialized cells and tissues. This differential expression is the result of different cells having different regulatory sequences, which are non-coding DNA sequences that control the expression of genes.
Regulatory sequences include enhancers, silencers, and promoters, among others. These sequences interact with regulatory proteins to control the expression of genes in a cell-specific manner. By binding to specific DNA sequences, regulatory proteins can activate or repress the transcription of genes, leading to differences in gene expression between cells.
Therefore, it is the presence or absence of specific regulatory sequences that ultimately determines which genes are expressed in a given cell, leading to differential gene expression between cells.
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Following is a list of tissue layers of the digestive tract. Which answer has them in correct order from lumen to external surface?
1. muscularis externa
2. muscularis mucosae
3. serosa
4. lamina propria
5. submucosa
a. 4, 2, 5, 1, 3
b. 3, 4, 5, 2, 1
c. 2,5,4,1,3
d. 4,5,2,1,3
e. 4,2,1,5,3
a. 4,2,5,1,3. The innermost tunic of the wall is called the mucosa, sometimes known as the mucous membrane layer. The gastrointestinal tract's lumen is lined with it.
Four layers, or tunics, make up the digestive tract's wall:
Mucosa\sSubmucosamuscle masssaline layer or serosaThe mucosa is made up of epithelium, a layer of loose connective tissue underneath termed lamina propria, and a thin layer of smooth muscle known as the muscularis mucosa. The mucosa in some areas becomes more surface area-rich by developing folds. The mucosa's specific cells secrete hormones, enzymes that aid in digestion, and mucus. The mucosa allows the lumen to be reached by ducts from other glands. The epithelium is composed of stratified squamous tissue in the mouth and anus, where thickness is required for abrasion protection.
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As you saw in the film, rock pocket mice evolved to have dark-colored fur in certain habitats. In three to five sentences, explain how this trait increased in frequency in the population. Include the following key terms: “fitness” (or “fit”), “survival” (or “survive”), “selection” (or “selective”), and “evolution” (or “evolve”).
Rock pocket mice evolved to have dark-colored fur in certain habitats.
How has this trait increased in frequency in the population?Certain traits are acquired in certain habitats due to natural selection, based on the fitness of an organism. When these species reproduce, their offspring contain these traits at a higher frequency. This is how a trait increases in frequency in a population during evolution. Natural selection is very important for survival.
In the case of rock pocket mice, dark colored fur trait is acquired by natural selection, and on the progression of generation, this trait is acquired by the mice.
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imagine that in the future we find unambiguous evidence for microbial life on mars. how could we know that this life is of independent origin? in other words, what are some properties that could indicate that this life originated on mars and not someplace else in the solar system (like earth)? select all that apply.
There are several properties that could indicate that microbial life found on Mars is of independent origin and not from Earth. These include:
1. The genetic makeup of the Martian microbes is different from that of known Earth organisms. If the Martian microbes have a different DNA or RNA sequence, amino acid composition, or other genetic characteristics from Earth life, this would suggest independent origins.
2.The Martian microbes use a different set of biochemical pathways than known Earth organisms. If the Martian microbes use different enzymes, metabolic pathways, or other biochemical processes than Earth life, this would suggest independent origins.
3.The Martian microbes are adapted to the Martian environment in ways that are different from known Earth organisms. If the Martian microbes have specific adaptations to the Martian climate, geology, or other features that are not seen in Earth life, this would suggest independent origins.
4.The Martian microbes are found in locations that are physically isolated from Earth. If the Martian microbes are found in regions of Mars that are geographically or geologically isolated from Earth (such as deep subsurface environments), this would suggest independent origins.
5.The Martian microbes have a fossil record that predates the earliest evidence of life on Earth. If the Martian microbes have a fossil record that dates back further than any known fossils on Earth, this would suggest independent origins.
6.The Martian microbes are phylogenetically distinct from Earth organisms. If the Martian microbes form a distinct branch on the tree of life, with no close evolutionary relationship to Earth life, this would suggest independent origins.
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A new slimming tea claims to contain substances that inhibit the actions of amylase (starch-digesting enzyme) and lipase (lipid-digesting enzyme)
Explain how this product helps reduce body mass.
Answer:
They are digestive enzymes
Explanation:
digestive enzymes that are important for weight loss help break down the food we eat and keep our metabolism burning fat. The enzymes important for weight loss include lipase, protease and amylase.
Enzymes are important for weight loss and for proper digestion. If your digestive system can't break down food, you won't absorb nutrients (causing fatigue or anemia) or detoxify your body.
You'll develop a sluggish metabolism and gain weight. When your digestion is poor, the food you consume won't supply your body with sufficient energy or help build healthy muscles and tissues.
In a ______________ reaction two or more substances combine to form a new single substance.
In a Combination reaction two or more substances combine to form a new single substance.
combination reaction is also known as synthesis reaction, where two or more substance react with each other to form a single and a new substance.
example, A+B = AB, where A and B both are reactants and AB is the new compound which is formed.
real life examples could be solid sodium metal reacts with chlorine gas to produce solid sodium chloride.
metals can also react with oxygen to form metal oxide, this example of combination reaction.
This is synthesis reaction as the substance formed in this kind is newly synthesized.
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which cytoskeletal elements resist stresses placed on a cell and participate in junctions that attach some cells to their neighbors?
Intermediate filaments are cytoskeletal elements that tend to resist stresses placed on a cell and participate in junctions that attach some cells to their neighbours.
What are cytoskeletal elements?Cytoskeletal elements are a network of protein filaments and tubules that provide structural support, shape, and organization to cells. They are essential components of the cytoplasm, and their dynamic interactions play a crucial role in many cellular processes. The three main types of cytoskeletal elements are microfilaments, intermediate filaments, and microtubules. Microfilaments are the thinnest of the cytoskeletal elements, composed of the protein actin, and involved in cell shape, movement, and division. Intermediate filaments are the most stable of the cytoskeletal elements, composed of various proteins, and provide mechanical strength to cells. Microtubules are the largest of the cytoskeletal elements, composed of the protein tubulin, and play a role in cell shape, intracellular transport, and cell division.
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Which of the following would be good examples of genotype-by-environment interactions? Select all that apply.a. two different strains of corn that differ in height due to genotypeb. a strain of corn whose yield varies with the amount of nutrients in the soilc. two different mutants of mice that share similar fat metabolism abilitiesd. a line of dairy cows that increases milk yield in relation to feed amounte. a line of chickens whose eggshells are extra thick regardless of feed typef. a strain of mutant mice that becomes obese regardless of feed amount
The good example of genotype- by environment interaction are strain of corn whose yield varies with the amount of nutrients in the soil and line of dairy cows that increases milk yield in relation to feed amount.
InteractionFair-skinned folks are more susceptible to skin cancer from sunlight exposure than people with darker complexion. This is an illustration of the relationship between genotype and environment.The term "genotype by environment (G E) interaction" describes the variance in how different genotypes react to various surroundings (Falconer and Mackay, 1996). Due to scaling or re-ranking effects, there are two basic types of G E interaction.The phrase "genotype environment (GxE) interaction effect") refers to both the modification of genetic risk factors by environmental risk and protective factors as well as the function of specific genetic risk factors in determining individual differences in vulnerability to environmental risk factors.For more information on genotype-environment kindly visit to
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What is the smallest unit of life functions?
Can I have help please
The definition of blood clot and why it is a significant health issue is described below.
What is a blood clot?Blood clot is a clot formed from platelets and other elements; that forms in a blood vessel in a living organism, and causes thrombosis or obstruction of the vessel at its point of formation or travel to other areas of the body.
Chemicals in tobacco smoke make certain proteins in your blood 'stickier'. This increases the risk of dangerous blood clots and can lead to a catastrophic heart attack.
Nicotine, which is present in smokes, is known to increase levels of hormones such as adrenaline in the body, which in turn can increase the formation of blood clots.
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