Answer:
the parasympathetic system keeps heart rate lower than the heart would beat on its own.
Explanation:
The parasympathetic nervous system (PNS) is one division of the autonomic nervous system. The vagus (parasympathetic) nerves that innervate the heart release acetylcholine in order to slow the heart rate by decreasing the slope of the pacemaker potential. Acetylcholine activates a type of G-coupled protein receptor known as muscarinic receptors, allowing for a parasympathetic reaction in the cardiovascular system (where these receptors are expressed), and thereby decreasing cardiac output by inhibiting heart rate. During rest, PNS predominates and controls the heart rate at a resting rate of 65-80 beats/minute (bpm), if parasympathetic nerves to the heart are cut, then the heart beats at its own rate of about 100 bpm.
Define the term variation as it relates to living organisms.
Lab: Energy Absorption/Reflection
Student Guide and Lab Instructions
In this laboratory exercise, you will design an experiment to test the ability of certain materials to absorb or reflect
sunlight.
Lesson Objectives
• Design an experiment to test your prediction.
• Explain how air temperature, air pressure, air density, and Earth's rotation interact to produce air circulations locally and globally.
• Explain how the absorption or reflection of sunlight may affect natural settings.
• Predict that different materials will absorb or reflect sunlight.
• Describe the consequences of the heat energy that is taken up by the atmosphere and what the atmosphere does with it.
• Explain how heat energy is transferred from the sun to Earth and the atmosphere.
PREPARE
Approximate lesson time is 60 minutes.
Materials
For the Student
• Laboratory Guidelines
Keywords and Pronunciation
specific heat: the energy, in calories, required to raise the temperature of one gram of a substance one degree
Celsius
LEARN
Activity 1: Energy Absorption/Reflection 1 (Online)
Activity 2: Energy Absorption/Reflection (Online)
Instructions
Introduction
Follow the Procedure below. As you complete the lab, take notes about the lab so you can participate in the discussion. In this laboratory exercise, you will design an experiment to test how different materials reflect or absorb light.
Procedure
Part 1: Formulate a Hypothesis
1. Keep these questions in mind as you develop your hypothesis:
• Do some colors absorb more light than others?
• Do some materials absorb or reflect more light than others?
• How could you indirectly measure the amount of sunlight absorbed by an object?
2. Write a hypothesis, in if...then format.
Part 2: Design an Experiment
3. Design an experiment that tests the absorption and reflection of different materials.
4. Create a list of materials and a procedure to test your hypothesis.
5. Record your idea in your lab report for discussion. Note that you do not need to perform the experiment.
When you have finished, you will discuss with your classmates through a threaded discussion board. Print the Grading Rubric for the Threaded Discussion Board Activity and review the contents. Your teacher will use this rubric to grade your participation in this discussion.
ASSESS
Discussion: Energy Absorption/Reflection 1 (Online)
Read the discussion prompt and carefully write your response. Remember:
What you type here is public. A good rule of thumb is to only post things here that you would be
comfortable communicating in person.
Responses should be well written (use a spell-checker) and clearly address the issue being discussed. You
may wish to write your response in a word processing program, and then copy and paste it into the topic
response box.
Your teacher will review postings regularly. Any postings containing foul language or inappropriate topics
will be removed, and the posting student will be referred to the administration. If you are in doubt about
whether something is appropriate to post, either ask your teacher first, or just don’t post it.
Review the Grading Rubric for Discussion Board Activity. Your teacher will use this rubric to grade your
participation in this discussion. Be sure to contact your teacher if you have any questions.
Answer:
Sit inside the car and drive down the mountains. The car will be able to run down from the road by the force of the gravity.
But if you drive up to the hill, if the car had less force you may need to put the car.
So, when you drive the car up to the hill, the car need/use more force or energy.
Explanation:
Like this picture.
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___ help the flow of blood from atrium to ventricle. HELPPP
Answer:
the two atrioventricular valves
SCIENCE
Which seafloor feature is an example of an abyssal plain?
Answer:
mid-ocean ridge
Ocean trenches
After scaling the mid-ocean ridge and traversing hundreds to thousands of miles of abyssal plains, you might encounter an ocean trench. The Mariana Trench, for example, is the deepest place in the ocean at 36,201 feet
Explanation:
please mark me brainliest and i think it is c
What determines whether an crop is a spring annual,
summer annual, or winter annual?
Agriculture is commonly described as the science or art of farming. What determines them is climate, temperature, cold, if seed can be sown outdoors in the spring , the ability to withstand early spring and fall frosts and winter temperatures.
Summer annual crops are known to germinate, flower, produce seed, and die by frost amidst the warmer months of the year.Winter annuals often sprout in the late summer and autumn, it is known to be dormant during the winter, and grow during the next spring and summer. its young winter annual plants live through the winter then flower, set seed and die out the following summer.
Winter annuals often bloom in winter or spring. They grows in very low to the ground. Examples are henbit, deadnettle, chickweed etc. Spring annuals are known to sprout early in the spring.
Learn more from
https://brainly.com/question/15654464
HELP ME HELP ME HELP ME
The maximum amount of money a single farmer can earn through the farm bill is BLANK
per year.
Answer:
>100000$
Explanation:
It's depends upon the type of crop the farmer does.If the farmer does crops like corn, sugarcanes then he will gain lots of money.But if it's wheat and rice then he will gain a few pennies .Answer:
The maximum amount of money a single farmer can earn through the farm bill is BLANK
per year.
Explanation:
➠ 100000$
Tastes associated with caffeine, quinine, or aspirin are detected primarily by ________ taste receptors.
Tastes associated with caffeine, quinine, or aspirin are detected primarily
by bitter taste receptors.
These receptors can either be TAS2Rs or T2Rs and they help to protect
against harmful food substances. They are also responsible in the
stimulation of hormones which increases hunger.
Bitter taste receptors are found in the oral cavity and stomach and it is the
receptor which bind to more than fifty percent of all the drugs
manufactured.
Read more about Bitter taste receptors here https://brainly.com/question/10733985
what valve separates two chambers and how do they function by preventing the
blood to go to what direction?
Answer:
bicuspid and tricuspid valve
Explanation:
Tricuspid valve separates right auricle and ventrical whereas bicuspid separates left auricle and ventrical.
they help by preventing the back flow of the blood by avoiding them to go to the position where they came from.
Ian experience pain in his leg after a fall he goes to the doctor after an exam the doctor explain to Ian that he has
injured a piece of tissue that connects his leg muscle to bone. What piece of tissue is the doctor describing?
cartilage
joint
Answer:
Tendon
Explanation:
It’s not cartilage because cartilage is connective tissue in between joints, and a joint is a place between bones that allows movement. Tendons connect muscles to bones.
Select all the correct answers.
Which two generalizations can be made based on what you know about cycles of matter in a closed system?
New matter is added, and old matter is destroyed.
OO
Matter changes its physical form, allowing it to return to its original state.
The amount of matter within the system remains the same.
Matter and energy can cross the boundaries of the system.
The cycle has a well-defined starting and stopping point.
Reset
Next
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Answer:
Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.Matter changes its physical form, allowing it to return to its original state.
Why do we discuss crude birth and death rates in environmental science?
A. it is too difficult to calculate the regular birth rate
B. it is too difficult to calculate the regular death rate
C. allows us to compare the populations of different
countries
D. because that's the way we've always done it
What are the three layers that make up the body of a Cnidarian?
A. endoderm, mesoderm, ectoderm
B. endoderm, mesoglea, ectoderm
C. ectoderm, mesoderm, mesoglea
D. endoderm, mesoglea, epidermis
Answer:
endoderm, mesoglea, ectoderm
Explanation:
took the test
Helpppppppppp HELPPPP
What two things must happen for there to be a proxigean spring tide?
full moon and the closet perigee
new moon and the furthest apogee
new moon and the closest perigee
full moon and the furthest apogee
Answer:
Full or New Moon + Perigee
What does a biological catalyst do?
Lowers activation energy
All of these
Is not used up during reactions
Speeds up reactions
Answer:
To answer the question of what is a biological catalyst, it is enzymes that help break down our bodily systems and help them function appropriately. Some examples of enzymes are: Maltase - These break down sugar maltose found in fatty foods like potatoes and pasta, into glucose.
Explanation:
Because of the good soil
composition found in this biome, the
majority of the farmlands in the
United States are found in
A. deserts
B. temperate forests
C. grasslands
Answer:
C. Grasslands
Question 6 of 10
Which organ do stem cells start differentiating to form a few weeks after
conception?
O A. Stomach
O B. Liver
O C. Heart
O D. Teeth
Which kingdom consists of only heterotrophic organisms? A. Bacteria B. Protista C. Fungi D. Plantae
Answer:
FUNGI
Explanation:
I did the quiz
How do index fossils help scientists?
Fossils are used to determine the ages of rock layers. ... Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in.
what do you expect to happen to our oak populations? Explain how this could affect other organisms in the ecosystem.
A DNA molecule is shaped like a _____.
A. Straight Ladder
B. Triple Helix
C. Long thin rod
D. Spiral Staircase
Answer: D. Spiral staircase
Explanation: Hope that helped you a ton.
help :(
Which of the following explains a similarity between the current farm bill and the Agricultural Adjustment Act (AAA) of 1933?
Both include payments given directly to farmers.
Both require the government to buy from certain growers.
Both set standard prices for produce commodities.
Both are designed to only benefit impoverished people.
Answer:
both set standard prices for produces commodities.
Answer:
Both require the government to buy from certain growers .Hope this helps you !!A scientist hypothesized that when two pea plants, both having the genotype all of the offspring would have at least one dominant allele for either shape or color. Which conclusion is supported by the data in the dihybrid cross above?
Answer:
The conclusion is incorrect.
Explanation:
There is a chance that the offspring may have the genotype rryy, in which it has no dominant alleles.
which skjvcxcghjtfdghjkhsdxfcghjkljgfcvjhbknllkjhfghjjk
What happens when the third phosphate group is removed from an ATP molecule?
Answer:
When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released
Explanation:
In 1860, a scientist named Gregor Mendel used pea plants to determine the dominance of certain traits. In one of his experiments, he looked at the inheritance of pod color. Construct a Punnett square for a pea plant with YY phenotype for a yellow pod cross-pollinated with a pea plant with yy phenotype for a green pod.
Which organelle is only
found in plant cells?
A. chloroplasts
B. cell membrane
C. nucleus
D. mitochondria
Answer:
Chloroplasts Is the answer you are looking for.
Hope this helps!
2 Which statement about viruses is NOT true? A Both bacteria and viruses can be a single cell. B Both bacteria and viruses have genetic material. С C Both bacteria and viruses can reproduce on their own. D Both bacteria and viruses can metabolize nutrients.
Answer: C. Both bacteria and viruses can reproduce on their own.
Viruses can not reproduce on their own. Unlike bacteria, viruses require a host cell in a body to reproduce. Without the host cell, they can not even survive on their own.
In a laboratory setting, embryonic stem cells can differentiate into which
types of cells?
any cell from the same organism
any type of prokaryotic cell
any cell from a different organism
any type of eukaryotic cell
Which of these is a compound?
Answer:
your anwser would be sugar please mark brainliest
Explanation:
Answer:
I think it's sugar.
Explanation:
It is formed by a combination of three atoms: carbon, hydrogen and oxygen.
Most scientists agree that life began on earth approximately 3.5 billion years ago. What would a scientist need to do in order to test this hypothesis and gather evidence?
A: Recreate the composition of the atmosphere and oceans on Earth as they were 4.5 billion years ago.
B: Travel to a similar planet or moon in its own early formation and recreate the chemical reactions which took place on Earth.
C: Gather the raw materials, such as inorganic compounds, on Earth 4.5 billion years ago and recreate the chemical reactions that could have taken place.
D: This is not a testable hypothesis since there is no way to travel back 4.5 billion years or to run the experiment for the next 4.5 billion years.
Answer:
A
Explanation:
Today, the atmosphere holds about 21 per cent oxygen. ... When the first simple organisms appeared in the oceans more than 3.5 billion years ago, the atmosphere was mostly nitrogen, hydrogen, water vapor, and carbon dioxide
