Question 1

Reduced hormone concentration in the blood often causes target cells to

Accepted Answer

A)  up-regulate receptors in order to increase cell sensitivity.
B)  up-regulate receptors in order to decrease cell sensitivity.
C)  down-regulate receptors in order to increase cell sensitivity.
D)  down-regulate receptors in order to decrease cell sensitivity.E) B) and D)
F) C) and D)

Question 2

Follicle-stimulating hormone is a

Accepted Answer

A)  glycoprotein.
B)  steroid.
C)  monoamine.
D)  oligopeptide.E) C) and D)
F) A) and B)

Question 3

Although hormones influence activity in the neural and reproductive systems,they do not influence the digestive system.

Accepted Answer

A) True 
 B)False

Question 4

When the activity of one hormone requires that of a second hormone,the interaction is said to be _________.

Accepted Answer

The answer of When the activity of one hormone requires...

Question 5

Which is not characteristic of the endocrine system

Accepted Answer

A)  Effects: causes metabolic activity changes in target cells
B)  Response time: slow reaction time = seconds to hours
C)  Duration of response: long-lasting = minutes to weeks
D)  Recovery time: rapid,immediate return to prestimulation level
E)  Communication method: hormones in the bloodstreamF) B) and C)
G) D) and E)

Question 6

When follicular cells of the thyroid are stimulated to secrete thyroid hormone (TH),they take up TH precursors from the inside of the follicle,transport and enzymatically modify them within a lysosome,and release TH to the blood.

Accepted Answer

A) True 
 B)False

Question 7

The hormones that come from the posterior pituitary

Accepted Answer

A)  are synthesized there and are released upon signals from the anterior pituitary.
B)  are synthesized in the hypothalamus and are released from the posterior pituitary when nerve signals arrive.
C)  are synthesized in the anterior pituitary and are transported to and from the posterior pituitary by the primary and secondary plexus.
D)  are synthesized in the posterior pituitary and released by the anterior pituitary by way of the hypophyseal portal system.E) A) and B)
F) A) and C)

Question 8

Exercise causes a(n) _______ in growth hormone (GH) levels;a rise in amino acid levels or decrease in glucose levels causes a(n) ________ in GH levels.

Accepted Answer

A)  increase,increase
B)  increase,decrease
C)  decrease,decrease
D)  decrease,increaseE) B) and D)
F) B) and C)

Question 9

Within the infundibulum,the axons from neurons extending into the posterior pituitary are known as the

Accepted Answer

A)  hypothalamo-hypophyseal tract.
B)  primary plexus.
C)  secondary plexus.
D)  supraoptic portal system.E) A) and D)
F) A) and B)

Question 10

Protein hormones are

Accepted Answer

A)  lipid-soluble.
B)  water-soluble.
C)  soluble in both water and lipids.
D)  soluble in neither water nor lipids.E) None of the above
F) B) and C)

Question 11

The release of hormones from the adrenal medulla is stimulated by

Accepted Answer

A)  adrenocorticotropic hormone.
B)  the sympathetic division of the autonomic nervous system.
C)  follicle-stimulating hormone.
D)  growth hormone.
E)  thyrotropic hormone.F) A) and D)
G) A) and C)

Question 12

Which is not true about the thyroid gland

Accepted Answer

A)  It requires iodine to synthesize thyroid hormone.
B)  It is located on the anterior surface of the trachea,inferior to the thyroid cartilage.
C)  It has two lobes connected by a central portion called the commissure.
D)  It secretes thyroid hormone in response to stimulation by TSH.
E)  An enlargement of the thyroid gland is called a goiter.F) B) and E)
G) B) and C)

Question 13

Eicosanoids are synthesized from

Accepted Answer

A)  cholesterol.
B)  prostaglandin.
C)  arachidonic acid.
D)  amino acids.E) All of the above
F) None of the above

Question 14

Which is not a cell type found in the pancreatic islets

Accepted Answer

A)  Alpha cell
B)  Delta cell
C)  Beta cell
D)  F cell
E)  C cellF) D) and E)
G) A) and D)

Question 15

Endocrine glands

Accepted Answer

A)  are ductless glands.
B)  are the organs of the endocrine system.
C)  secrete hormones directly into the bloodstream.
D)  help maintain homeostasis.
E)  All of the choices are correct.F) B) and C)
G) B) and E)

Question 16

The pars distalis is part of the adenohypophysis.

Accepted Answer

A) True 
 B)False

Question 17

-This figure shows the pituitary gland.Which number indicates the pars nervosa

Accepted Answer

A)  1
B)  2
C)  4
D)  5
E)  6F) C) and E)
G) B) and C)

Question 18

Damage to the liver might impair enzymatic degradation of some hormones.The levels of such hormones in the blood would therefore be expected to

Accepted Answer

A)  increase.
B)  decrease.
C)  remain unchanged.D) A) and B)
E) All of the above

Question 19

Lipid-soluble hormones,such as progesterone,exert their effects by forming hormone-receptor complexes that

Accepted Answer

A)  activate a G protein and second-messenger cascade.
B)  bind to DNA and initiate transcription.
C)  open ion channels in the cell membrane.
D)  activate adenylate cyclase.E) A) and B)
F) C) and D)

Question 20

Eicosanoids are a primary type of local hormone.

Accepted Answer

A) True 
 B)False

Exam 17: Endocrine System

Within the infundibulum,the axons from neurons extending into the posterior pituitary are known as the

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-This figure shows the pituitary gland.Which number indicates the pars nervosa

Correct AnswerverifiedShow Answer

Which is not characteristic of the endocrine system

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Lipid-soluble hormones,such as progesterone,exert their effects by forming hormone-receptor complexes that

Correct AnswerverifiedShow Answer

Reduced hormone concentration in the blood often causes target cells to

Correct AnswerverifiedShow Answer

Eicosanoids are a primary type of local hormone.

Correct AnswerverifiedShow Answer

Eicosanoids are synthesized from

Correct AnswerverifiedShow Answer

The pars distalis is part of the adenohypophysis.

Correct AnswerverifiedShow Answer

Exercise causes a(n) _______ in growth hormone (GH) levels;a rise in amino acid levels or decrease in glucose levels causes a(n) ________ in GH levels.

Correct AnswerverifiedShow Answer

Which is not true about the thyroid gland

Correct AnswerverifiedShow Answer

Although hormones influence activity in the neural and reproductive systems,they do not influence the digestive system.

Correct AnswerverifiedShow Answer

When the activity of one hormone requires that of a second hormone,the interaction is said to be _________.

Correct AnswerverifiedShow Answer

Damage to the liver might impair enzymatic degradation of some hormones.The levels of such hormones in the blood would therefore be expected to

Correct AnswerverifiedShow Answer

The release of hormones from the adrenal medulla is stimulated by

Correct AnswerverifiedShow Answer

Endocrine glands

Correct AnswerverifiedShow Answer

When follicular cells of the thyroid are stimulated to secrete thyroid hormone (TH),they take up TH precursors from the inside of the follicle,transport and enzymatically modify them within a lysosome,and release TH to the blood.

Correct AnswerverifiedShow Answer

Protein hormones are

Correct AnswerverifiedShow Answer

Which is not a cell type found in the pancreatic islets

Correct AnswerverifiedShow Answer

Follicle-stimulating hormone is a

Correct AnswerverifiedShow Answer

The hormones that come from the posterior pituitary

Correct AnswerverifiedShow Answer

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Exercise causes a(n) _ in growth hormone (GH) levels;a rise in amino acid levels or decrease in glucose levels causes a(n) __ in GH levels.

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