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Multiple Choice Quiz
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1

Chemical messengers are involved in
A)communication.
B)maintaining homeostasis in an animal's body.
C)the body's response to various stimuli.
D)all of the above (a-c).
2

Which of the following is not a major endocrine gland in vertebrates?
A)hypothalamus
B)pituitary
C)thyroid
D)placenta
3

Those chemicals that are released to the exterior of one animal and affect the behavior of another animal are called
A)neurotransmitters.
B)local chemical messengers.
C)pheromones.
D)hormones.
4

Which of the following is not a type of hormone?
A)carbohydrates
B)polypeptides
C)amines
D)steroids
5

The fixed-membrane receptor mechanism for hormone action involves hormones that are
A)proteins and amines.
B)carbohydrates and steroids.
C)steroids and polypeptides.
D)carbohydrates and polypeptides.
6

The mobile-receptor mechanism for hormone action involves hormones that are
A)steroids.
B)carbohydrates.
C)polypeptides.
D)amines.
7

Hormones in flatworms affect
A)water balance.
B)reproduction.
C)regeneration.
D)more than one answer is correct.
8

With respect to invertebrates, which of the following has the most advanced endocrine system?
A)echinoderms
B)arthropods
C)annelids
D)molluscs
9

Frog metamorphosis is regulated by a hormone from the
A)hypothalamus.
B)kidney.
C)adrenal.
D)pineal.
10

In vertebrates, chromaffin tissue is associated with the
A)brain.
B)adrenal glands.
C)reproductive system.
D)digestive system.
11

Which of the following is not produced by the anterior lobe of the pituitary gland?
A)STH
B)ACTH
C)FSH
D)MSH
12

Which of the following is not produced by the hypothalamus?
A)TSH
B)CRH
C)PIF
D)calcitonin
13

Epinephrine or adrenaline is produced by the __________ gland(s).
A)adrenal
B)pituitary
C)thyroid
D)parathyroid
14

Which of the following glands diminishes in size as a vertebrate ages?
A)pituitary
B)pineal
C)hypothalamus
D)thymus
15

All of the following are hormones of the digestive tract except
A)CCK.
B)gastrin.
C)secretin.
D)atriopeptin.
16

In vertebrates, the primary endocrine control center is found in the
A)hypothalamus.
B)pineal.
C)both hypothalamus and pineal.
D)adrenal glands.
17

The kidneys produce the hormone
A)erythropoetin.
B)gastrin.
C)secretin.
D)hCG.
18

Hormones modify the biochemical activity of a target cell or tissue.
A)True
B)False
19

A hormone is a specialized chemical messenger that an endocrine gland or tissue produces and secretes.
A)True
B)False
20

The pancreas produces several hormones that help regulate reproductive functions.
A)True
B)False
21

The adrenal medulla is under control by the brain via sympathetic nerves.
A)True
B)False
22

Zoologists know more about the endocrine system of invertebrates than of any other animal group.
A)True
B)False
23

Jawed fishes and primitive tetrapods have ultimobranchial glands.
A)True
B)False
24

In insects, hormones play a major role in growth, maturation, and reproduction.
A)True
B)False
25

Classical endocrine glands have been identified in nematodes.
A)True
B)False





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