Question 1

Ecdysone is a hormone that causes molting of the exoskeleton in insects. Why do ecdysone- based pesticides have no effect on humans?

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Question 2

What is meant by the phrase "cyclic AMP acts as a second messenger"?

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Question 3

Why do fat- free diets affect the production of steroid hormones?

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Question 4

Why are some people concerned about hormones in cattle feed?

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Question 5

Testosterone is produced by the _ _ and the adrenal cortex.

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Question 6

Stress increases cortisol secretion. Why would diabetics have problems controlling their blood sugar levels when they are stressed?

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Question 7

Do fat cells function as an endocrine gland? Explain.

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Question 8

How does aspirin help to stop pain?

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Question 9

Why are pituitary tumors so dangerous?

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Question 10

Rapid loss of blood may lead to shock and death. What series of events do the kidneys initiate to raise the blood pressure of a person who has been severely cut to prevent shock and subsequent death?

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Question 11

If a person gets a shot of epinephrine, he or she almost immediately feels the effects (e.g., increased heart and breathing rates). If the same person gets a shot of a steroid hormone such as cortisone, there is no immediate response. What is the reason for this difference?

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Question 12

The anterior pituitary produces hormones that stimulate other endocrine glands to produce their secretions. What stimulates the anterior pituitary to release its hormones?

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Question 13

How does ADH help to prevent dehydration?

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Question 14

Anabolic steroids are synthetic steroid hormones that bind to testosterone receptors and stimulate muscle development. This appeals to your weight- lifting roommate who promptly orders the drug online. How would you dissuade your roommate from taking the drug?

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Question 15

Explain why oxytocin and prolactin are both necessary for nursing.

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Question 16

Why do hormones affect some cells but not others?

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Question 17

A lack of _ _ in the diet can lead to the formation of an enlarged thyroid or goiter.

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Question 18

What is a target cell?

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Question 19

What is the main function of thyroxine?

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Question 20

Individuals suffering from _ produce insulin; however, their cells fail to respond.

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Quiz 38: Chemical Control of the Animal Body: the Endocrine System