Given the number of blood vessels in the retina, why do you suppose that you are not able to see them normally

Answers

Answer 1

Answer:

You can't see the blood vessels themselves because vision depends on a process that makes it impossible to see things that are stationary with respect to the retina. Light receptors in the retina respond only to changes in light reaching them, not to a steady image.

Have a great day! :D


Related Questions

What is the term for the breakdown of glucose in the presence of oxygen?

anaerobic

cellular respiration

fermentation

photosynthesis

Answers

Answer:

Cellular respiration

Explanation:

Cellular respiration involves the breakdown of glucose using oxygen to produce energy, or ATP, that is used by the cell

What is meant by a biological system

Answers

Biological System - A biological system is a group of entities or organs that interact to complete a task. It's a biological unit that makes up a body or an organism.

Hope this helps!!



Which of the following is a reasonable claim the researchers can make based on the data in the graphs?

Answers

Answer:

First give the options we can't tell random ir may be wrong give options because in question it is asking which of the following if we say any randomly it becomes wrong.

I need help with one paragraph.

Answers

Answer:

I miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rageI miss the rage

Explanation:

Someone help please 20 points

Answers

Answer:

2

neutral

hydroxide

a) hydronium

hydroxide

b) Hydroxide

hydronium

3

pH

14

a) neutral

acidic

basic

b) pH

tenfold

C

1) indicator

2)indicator

solution

pH

3) meter

..............BRAINLIST. ........... :)

the principal mineralocorticoid is _____________ that helps regulate levels of _____________ in the blood and body fluids.

Answers

Answer:

The principal mineralocorticoid is aldosterone that helps regulate levels of sodium and potassium ions in the blood and body fluids.

Item 5
What molecule that is created during photosynthesis provides energy for cellular processes?

ATP

chlorophyll

glucose

oxygen

Answers

Answer:

Glucose

Explanation:

Glucose is produced during photosynthesis and it is oxidised during cellular respiration to produce ATP energy.

Answer:

glucose

Explanation:

took test

What are the four most common elements in all living things

Answers

Answer:

Oxygen

Oxygen is the most abundant element contained within living organisms, composing about 65% of the human body. Oxygen is also the most abundant element in the Earth's crust, and in the air that is essential for most life on Earth. Oxygen's presence in the body is largely in the form of water, which is used to produce the energy within the body needed to sustain life.

Carbon

Carbon forms the basis for all life on Earth; indeed, life forms on Earth are referred to as carbon-based life forms, emphasizing the importance of this element for life. Carbon atoms readily bond to other atomic elements, such as oxygen and nitrogen. Since carbon can so readily bond to other elements, long chains of bonds can form and provide the physical and chemical structure needed for the complex processes and structures that occur within living organisms, such as structural proteins and genetic information in the form of nucleic acids.

Hydrogen

Hydrogen is the simplest element, as its atom contains only a single proton and a single neutron. As a result of this simplicity, hydrogen readily bonds with other elements, making it an important component for the formation of living organisms. Hydrogen is the other element (along with oxygen) which forms water, a crucial component for most life forms on Earth. Hydrogen is also a byproduct in many biological reactions, including photosynthesis and metabolism.

Nitrogen

Nitrogen is one of the most abundant elements on Earth, composing approximately 80% of the air on Earth. Nitrogen is an important element in the development of plant life, as compounds containing these elements are readily absorbed and used by plants. Nitrogen is also an important component of many proteins and deoxyribonucleic acids (DNA), which is crucial for genetic material to be passed on to subsequent generations of life.

Sulfur

Sulfur is a major component of two essential amino acids used by living organisms: cysteine and methionine. These amino acids, like all amino acids, are crucial for the construction of proteins that are used for structural stability and repair of living organisms. For example, the structural integrity of hair and feathers can be attributed to these amino acids. Sulfur is also used as a source of energy and is metabolized by some species of bacteria and other lower life forms.

Phosphorus

Phosphorus is used in the formation of phospholipids, a type of molecule that is a major component of the cell membrane of all living cells. Without this cell membrane, cells would not be able to develop and would not have the structural stability to form in the first place. This protective layer of phospholipids holds all the internal components of cells in place, allowing for the processes that maintain the life of the cell to take place. The phospholipid layer also protects the cell by keeping any unwanted or potentially destructive materials outside of the cell.

(via sciencing.com)

Explanation:

hope it helps

What is one defining feature of a prokaryotic cell?


have a cell wall outside plasma membrane


cytoplasm surrounds organelles


organelles are not membrane-bound


membrane-bound organelles

Answers

Answer:

Here.

Explanation:

Cytoplasm Surrounds Organelles

Hi can someone plss help me with this!!

Answers

Explanation:

4. evaporates , ocean

8. transpiration,

9. acid rain

Aerobic respiration where does it occur.

Answers

While most aerobic respiration (with oxygen) takes place in the cell's mitochondria, and anaerobic respiration (without oxygen) takes place within the cell's cytoplasm

What is Alternation of generation

Answers

Answer:

Alternation of generations is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages.

Explanation:

At each step of the food chain, how much energy is used by the organism and how much is stored in their tissues?

Answers

90% of the energy is used up between levels, and the remaining 10% stays in the tissues to be passed on.

who developed a theory of evolution identical to darwin’s?

Answers

Answer:

Alfred Wallace

Explanation:

3.The type of epithelial tissues which consists of layers of flat cell is
a. cuboidal epithelium b. stratified epithelium c.columnar epithelium
d. glandular epithelium

Answers

Answer:

columner and cuboidal epithelium

What invertebrate animals are the ancestors of tetrapods

A)jellyfish

B)cartilaginous fish

C)jawed fish

D)jawless fish

Answers

Answer:

D I believe

Explanation:

What is a fishing bed

Answers

A fishing bed is an underwater solid surface on which fish spawn to reproduce themselves

transcription starts with ____ and makes ____ with the aid of ____________

Answers

1. Initiation
2. RNA molecule
3. Sorry do not know the correct answer

Answer:

transcription starts with Initiation/the nucleus/DNA and makes mRNA with the aid of Polymerase RNA enzyme

Explanation:

Transcription is the process in protein synthesis consisting of a starting process of initiation where the nucleus hosts the creation of an mRNA sending the coding message to the ribosome, but the starting process is the Polymerase binding to a site on the DNA strand, then it makes the mRNA through the other steps in transcription.

How would air pollution affect the lives and/or livelihoods of those in the open markets of India?

Answers

Answer: It can make them sick and cause sickness or death and can make their businesses lose money.

Explanation:

The health effects of air pollution are serious – one third of deaths from stroke, lung cancer and heart disease are due to air pollution. ... Microscopic pollutants in the air can slip past our body's defences, penetrating deep into our respiratory and circulatory system, damaging our lungs, heart and brain.

How is the Calvin Cycle different from the light dependent reactions?
A. It requires light
B. It takes place in chloroplasts
C. It takes place in the Stroma
D. It takes place in the thylakoid membrane

Answers

I believe it’s c. It takes place in the stroma
The Calvin cycle takes place in the stroma so the answer is C

If two 4-Newton forces act on an object in the same direction, what is the net force on the object?​

Answers

Answer:

8 Newton net force

Explanation:

Have a nice day

Why does DNA need to replicate before cells divide?

Answers

Answer:

Below:

Explanation:

Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.

whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.

Which process does the grass use to make the food this horse needs?
A. Photosynthesis
B. Digestion
C. Respiration
D. Eating

Answers

A)photosynthesis
Nothing more to say

Which is not a major factor that influences the strength of a rock?



time



rock type



age of rock



temperature

Answers

structure and texture

damage to the sinoatrial node in humans would ________.

Answers

Answer:

have a decrease in blood pressure

Explanation:

hope it helped<3

mark brainlliest

Damage to the sinoatrial node in humans can result in irregular heartbeats, abnormal heart rhythms, decreased cardiac output, and an increased risk of sudden cardiac arrest. Prompt medical evaluation and appropriate treatment are crucial to manage these effects and maintain a healthy heart rhythm.

Damage to the sinoatrial (SA) node in humans would result in disruptions to the normal electrical conduction system of the heart. The SA node is often referred to as the "natural pacemaker" of the heart because it initiates the electrical impulses that regulate the heartbeat. Here's how damage to the SA node would affect the heart:

1. Irregular Heartbeat: The SA node is responsible for setting the pace of the heartbeat. If it is damaged, the heart may beat too fast, too slow, or irregularly. This can lead to symptoms like palpitations, dizziness, and shortness of breath.

2. Abnormal Heart Rhythms: Without the SA node functioning properly, other areas of the heart may take over the role of generating electrical impulses. However, these impulses may not be coordinated or synchronized, resulting in abnormal heart rhythms such as atrial fibrillation or heart block.

3. Decreased Cardiac Output: The SA node helps regulate the timing of the heart's contractions, ensuring efficient blood flow throughout the body. Damage to the SA node can disrupt this coordination, leading to decreased cardiac output. This means that the heart may not be able to pump enough blood to meet the body's needs, resulting in symptoms like fatigue and weakness.

4. Risk of Sudden Cardiac Arrest: In severe cases, damage to the SA node can increase the risk of sudden cardiac arrest. Without the SA node's ability to regulate the heartbeat, the heart may stop pumping blood effectively, leading to a life-threatening emergency.

5. Treatment Options: Treatment for damage to the SA node depends on the severity and symptoms. In some cases, medication or cardiac devices like pacemakers may be used to regulate the heart's rhythm and ensure proper electrical conduction.

To know more about sinoatrial node:

https://brainly.com/question/6138360

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Which of the following is a lipid-protein substance produced by neuroglial cells?

Answers

Answer:

Myelin

Explanation: is correct

Answer:

3: Myelin

Explanation:

Why would you use sodium hydrogen carbonate in an investigation

Answers

Answer:

Investigating photosynthesis. The effect of light intensity on photosynthesis can be investigated in water plants. ... Sodium hydrogen carbonate - formula NaHCO 3 - is added to the water to supply carbon dioxide - a reactant in photosynthesis - to the plant.

Explanation:

hope this helps

as a result of ach stimulation, calcium ions are released from the ______ of the sarcoplasmic reticulum.

Answers

Answer:

terminal cisternae

Explanation:

Genes from genetically modified corn frequently move to non-genetically modified corn plants because of outcrossing. This is a major concern to ______. Multiple choice question. transgenic crop manufacturers because outcrossing can lead to loss of introduced genes from transgenic plants herbicide manufacturers because of the potential for the evolution of super weeds organic farmers, whose fields are close to transgenic corn, because transgenic crops cannot be certified as organic

Answers

This will  be a major concern to transgenic crop manufacturers because

outcrossing can lead to loss of introduced genes from transgenic plants.

Outcrossing involves the process of crossing two different breeds thereby

introducing unrelated genetic material into it.

Crop manufacturers will be concerned if the genes from genetically modified

corn frequently move to non-genetically modified corn plants because as time goes on, the trait which made the genetically modified corn will be lost as different variations and more dominant traits will make such traits recessive and lost.

Read more on https://brainly.com/question/25613278

When Clara's doctor taps her knee with the rubber hammer, her knee ______. Which portion of the spinal cord is responsible for this movement?

Brainly notice: Don't use such phrases here, not cool! It hurts our feelings :(

Answers

Answer:

b. Grey matter

Explanation: is correct

Answer:

The answer is letter B.

Explanation:

Gray Matter

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