BIOLOGY HIGH SCHOOL

The fight-or-flight response in humans is activated by epinephrine, a hormone secreted by the _____ glands.pituitary
thyroid
parathyroid
adrenal

Answers

Answer 1
Answer:

The correct answer is adrenal

Adrenal glands are also called suprarenal glands which are located on the kidneys. They produce various hormones including epinephrine (adrenaline). Adrenaline is secreted when a person is under a fight-or-flight. This hormone quickly responds to the emergent situation or threat by increasing heart rate, slowing blood flow to muscle cells and changes other autonomic nervous functions, which gives energy and strength to fight any emergency.

Answer 2
Answer: The sympathetic nervous system. The hypothalamus, in close association with the limbic system of the brain. The two main chemicals invoved here are the neurotransmitter "norepinephrine" (noradrenaline) and the hormone "epinephrine" (adrenaline).
So I would say D

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Read the following statements that describe what happens as an impulse travels. What is the correct order in which the steps occur? 1) The impulse continues to travel down the axon away from the cell body. 2) Na+ gates close and K+ ions flow back out of the cell restoring the resting potential. 3) Gated K+ and Na+ channels are closed. The inside of the cell is slightly negative compared to the outside. 4) The neuron receives a stimulus great enough to start an impulse. 5) Gated Na+ channels open. The net movement of Na+ ions into the cell produces the action potential..

Louis pasteur proposed...........a. the concept of atomic weight
b. the germ theory of disease.
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Answers

The answer is b. the germ theory of disease.

Louis Pasteur proposed that some diseases are caused by germs in the XIX century.
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Answers

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In what order does blood flow through the body and heart? A. Right atrium, left atrium, lungs, right ventricle, left ventricle, body. B. Right atrium, left ventricle, lungs, left atrium, right ventricle, body. C. Right atrium, right ventricle, lungs, left ventricle, left atrium, body. D. Right atrium, right ventricle, lungs, left atrium, left ventricle, body.

Answers

The statement that describes the order blood flows through the body and the heart is:

  • Right atrium, right ventricle, lungs, left atrium, left ventricle, body.

What is blood?

It is a red liquid with different shades that varies according to the amount of oxygen it has inside, that is, hemoglobin.

Characteristics of blood circulation

  • It is a necessary substance for oxygenation to occur between cells, as well as to regulate blood pressure.

  • Each side of the heart is divided into an upper chamber called the atrium and a larger, lower chamber called the ventricle.

  • The blood flows since it has left the right ventricle, has been oxygenated by the lungs and has returned to the left atrium through the pulmonary veins, it is carried to the left ventricle.

Therefore, we can conclude that the main function of the blood is to ensure that oxygen and nutrients are distributed between the cells of each organism.

Learn more about blood circulation here: brainly.com/question/3346248

Answer:

answer is D

l

Explanation:

Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body's tissues through the aorta.

Characteristics of animal cells include which of the following? Select all that apply. no cell wall, only plasma membrane

large hypertonic vacuole

no chlorophyll or chloroplasts

cell plate in cell division

cleavage furrow

Answers

Primarily, the properties exhibited by animal cells are:
No cell wall, only plasma membrane (cell walls are a property of plant cells)
No chlorophyll or chloroplasts (animals do not photosynthesize so do not have these organelles)
Cleavage furrow (exhibited during cell replication)

Answer:

no cell wall, only plasma membrane

cleavage furrow

Explanation:

The animal cells are different from the plant cells in many ways. The specific characteristic features of the animal cell include the absence of the cell wall, and the formation of the cleavage furrow during the cell division.

The animal cells only have plasma membrane around them. No large hypertonic vacuole is present. The chlorophyll and chloroplasts are present in the plant cells and not in the animal cells. The cell plate is formed in the plant cells during the cell division. In the animals, a cleavage furrow is formed instead of the cell plate.

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b. False

Answers

It is false that the populations of the great apes in Africa are recovering and on the rise.

Answer: FALSE (just took the test)

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Answers

ribose sugar is a part of adenosine diphosphate
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