Biology (Raven), 9th Edition

Chapter 46: The Endocrine System

Post-Test

1
Paracrines:
A)are just an alternative name for hormones.
B)travel through the blood.
C)are secreted by the parathyroid gland.
D)act within an organ as local regulators.
E)are neurohormones.
2
What is NOT true of the action of hydrophilic hormones?
A)They can act through intermediary G proteins.
B)A second messenger (e.g. cAMP) is often involved.
C)They can work by activation of transmembrane receptor proteins.
D)They stimulate an immediate response.
E)They have a long duration of action (e.g. days).
3
What is the proximate cause of a goiter?
A)reduced levels of TRH.
B)a non-functional thyroid gland
C)elevated levels of thyroid stimulating hormone
D)depressed levels of thyroid stimulating hormone
E)none of these
4
The hormones insulin and glucagon are produced by different cells in the pancreas and have antagonistic effects. Insulin promotes the cellular uptake of glucose into liver, muscle and fat cells. What occurs when blood glucose levels decrease?
A)There is decreased insulin and glucagon production.
B)There is increased glucagon production.
C)Glycogen is hydrolyzed by the liver and glucose is released into the blood.
D)There is increased insulin production.
E)both increased glucagon and glucose release from the liver.
5
You are rearing some plant bugs in the lab and they go through regular molts but never become sexually mature and remain in the nymphs. What could be the cause of this?
A)Incorrect rearing temperature.
B)A juvenile hormone analogue in the food.
C)An ecdysone analogue in the food.
D)Incorrect photoperiod affecting melatonin production.
E)None of these
6
Hormones have the following property(ies):
A)they are highly reactive molecules.
B)they are relatively complex molecules.
C)they are quite stable molecules.
D)they are very large molecules.
E)they are both complex and stable.
7
Lipophilic hormones generally work faster than hydrophilic hormones because they pass through the cell membrane and work directly in the cell.
A)True
B)False
8
Antidiuretic hormone (ADH) is secreted by the posterior pituitary and stimulates water reabsorption by the kidneys. What happens if you become dehydrated?
A)More ADH is secreted.
B)Less ADH is secreted.
C)Your urine will become less concentrated.
D)Diuretic hormone will be secreted.
E)none of these.
9
A person who exhibits weight loss, nervousness and overheating, may be suffering from:
A)hypothyroidism.
B)diabetes.
C)cretinism.
D)hyperthyroidism.
E)hypoglycemia.
10
Hormones are only produced by endocrine glands.
A)True
B)False
11
Insulin and ADH are examples of
A)steroid hormones.
B)amine hormones.
C)peptide/protein hormones.
D)glycoproteins.
E)pheromones.
12
Norepinephrine is a
A)neurotransmitter.
B)hormone.
C)neurotransmitter and hormone.
D)steroid hormone.
E)none of these
13
Which of the following statements about prostaglandins is true?
A)Aspirin promotes the production of prostaglandins.
B)Prostaglandins are produced only by endocrine glands.
C)Prostaglandins travel in the circulatory system to reach their target cells.
D)All of these are true.
E)None of these are true.
14
Cytokines
A)regulate different cells of the immune system.
B)promote growth and cell division in specific organs.
C)help maintain proper mineral balance in the body.
D)help maintain proper water balance in the body.
E)regulate reproductive cycles.
15
Which of the following types of hormones enter their target cells?
A)polypeptide hormones
B)steroid hormones
C)glycoprotein hormones
D)all of these
E)none of these
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