Question 1

When the effects of water-soluble hormones on their target cells are considered,the hormone itself is

Accepted Answer

A)  the G protein.
B)  the second messenger.
C)  the first messenger.
D)  the hormone-response element.
E)  the phospholipase.F) B) and E)
G) A) and E)

Question 2

-This figure shows an example of regulation of hormone secretion by a negative feedback loop.The large box labeled 1 represents the initial stimulus.Which could be the initial stimulus for this pattern of regulation

Accepted Answer

A)  High blood calcium level
B)  Low body temperature
C)  Low blood sugar level
D)  High WBC (white blood cell) count
E)  Low RBC (red blood cell) countF) None of the above
G) B) and D)

Question 3

Generally,the shorter the half-life of a hormone

Accepted Answer

A)  the more frequently it must be replaced.
B)  the less frequently it must be replaced.C) A) and B)
D) undefined

Question 4

Compared to the nervous system,the endocrine system has

Accepted Answer

A)  more localized and long-lasting effects.
B)  more widespread and long-lasting effects.
C)  more localized and short-term effects.
D)  more widespread and short-term effects.E) None of the above
F) A) and B)

Question 5

Each of the body's blood-borne hormones comes from the major endocrine glands,namely,the pineal,pituitary,thyroid,parathyroid,or adrenal glands.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following does not have an endocrine function

Accepted Answer

A)  Urinary bladder
B)  Adipose tissue
C)  Liver
D)  Small intestineE) A) and D)
F) A) and C)

Question 7

What is the function of the mineralocorticoids secreted by the adrenal gland

Accepted Answer

A)  Regulate glucose levels in the blood
B)  Act as secondary sex hormones
C)  Stimulate metabolism of lipids
D)  Regulate electrolyte concentration in body fluids
E)  Stimulate metabolism of proteinsF) A) and C)
G) B) and E)

Question 8

Lipophilic hormones bind to ___________ receptors of target cells.

Accepted Answer

A)  intracellular
B)  membrane-boundC) A) and B)
D) undefined

Question 9

Cortisol binds to _________ receptors and has the effect of ________ blood glucose levels.

Accepted Answer

A)  intracellular,raising
B)  intracellular,lowering
C)  membrane-bound,raising
D)  membrane-bound,loweringE) None of the above
F) A) and B)

Question 10

How does aging affect the endocrine system

Accepted Answer

A)  Secretory activity of endocrine glands decreases.
B)  Normal levels of hormones,particularly growth hormone and sex hormones,often decrease.
C)  Aging reduces the efficiency of endocrine system functions.
D)  Endocrine system imbalances can lead to weight gain or muscle loss.
E)  All of the choices are correct.F) A) and D)
G) B) and E)

Question 11

Once a structure is fully grown and mature,it will probably

Accepted Answer

A)  up-regulate its receptors for growth hormone,as it no longer receives as much of the ligand.
B)  up-regulate its receptors for growth hormone,as it no longer needs to continue to grow at a fast rate.
C)  down-regulate its receptors for growth hormone,as it no longer receives as much of the ligand.
D)  down-regulate its receptors for growth hormone,as it no longer needs to continue to grow at a fast rate.E) A) and D)
F) None of the above

Question 12

Somatostatin suppresses the release of pancreatic polypeptide.

Accepted Answer

A) True 
 B)False

Question 13

Increasing levels of cortisol inhibit the release of corticotropin-releasing hormone (CRH).

Accepted Answer

A) True 
 B)False

Question 14

Most hormones are made of chains of amino acids and are therefore

Accepted Answer

A)  steroids.
B)  biogenic amines.
C)  proteins.
D)  catecholamines.E) None of the above
F) A) and D)

Question 15

The three distinct areas of the anterior pituitary are the

Accepted Answer

A)  pars nervosa,pars distalis,and pars intermedia.
B)  pars distalis,pars intermedia,and pars tuberalis.
C)  pars tuberalis,median eminence,and pars intermedia.
D)  pars tuberalis,pars distalis,and pars nervosa.
E)  pars intermedia,median eminence,and pars distalis.F) B) and E)
G) A) and B)

Question 16

Pancreatic hormones are secreted directly into the pancreatic duct for rapid transport to the small intestine.

Accepted Answer

A) True 
 B)False

Question 17

Which is not correct regarding growth hormone (GH)

Accepted Answer

A)  GH affects most body cells.
B)  GH stimulates cell growth and mitosis.
C)  GH is also known as somatotropin.
D)  GH stimulates the kidney to secrete somatomedin.
E)  GH is a tropic hormone.F) A) and D)
G) C) and D)

Question 18

A G protein is

Accepted Answer

A)  a type of water-soluble hormone.
B)  a second messenger activated by a steroid hormone.
C)  a molecule that binds a guanine nucleotide and helps transduce a signal inside a target cell.
D)  a receptor for a water-soluble hormone that causes arachidonic acid to be extracted from a phospholipid.
E)  an enzyme that catalyzes the conversion of ATP into cyclic AMP.F) C) and E)
G) B) and D)

Question 19

-This figure shows an example of regulation of hormone secretion by a negative feedback loop.The large box labeled 1 represents the initial stimulus.What endocrine glands are indicated by the letters d and e

Accepted Answer

A)  d = hypothalamus,e = posterior pituitary
B)  d = thalamus,e = anterior pituitary
C)  d = hypothalamus,e = anterior pituitary
D)  d = hypothalamus,e = thyroid gland
E)  d = thalamus,e = posterior pituitaryF) All of the above
G) C) and D)

Question 20

When the effects of one hormone reinforce the activity of another hormone on the same target cell,the interaction is said to be

Accepted Answer

A)  agonistic.
B)  antagonistic.
C)  synergistic.
D)  permissive.E) C) and D)
F) All of the above

Exam 17: Endocrine System

Increasing levels of cortisol inhibit the release of corticotropin-releasing hormone (CRH).

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When the effects of one hormone reinforce the activity of another hormone on the same target cell,the interaction is said to be

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Compared to the nervous system,the endocrine system has

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A G protein is

Correct AnswerverifiedShow Answer

When the effects of water-soluble hormones on their target cells are considered,the hormone itself is

Correct AnswerverifiedShow Answer

Somatostatin suppresses the release of pancreatic polypeptide.

Correct AnswerverifiedShow Answer

Pancreatic hormones are secreted directly into the pancreatic duct for rapid transport to the small intestine.

Correct AnswerverifiedShow Answer

What is the function of the mineralocorticoids secreted by the adrenal gland

Correct AnswerverifiedShow Answer

-This figure shows an example of regulation of hormone secretion by a negative feedback loop.The large box labeled 1 represents the initial stimulus.Which could be the initial stimulus for this pattern of regulation

Correct AnswerverifiedShow Answer

Once a structure is fully grown and mature,it will probably

Correct AnswerverifiedShow Answer

Which of the following does not have an endocrine function

Correct AnswerverifiedShow Answer

Cortisol binds to _________ receptors and has the effect of ________ blood glucose levels.

Correct AnswerverifiedShow Answer

Which is not correct regarding growth hormone (GH)

Correct AnswerverifiedShow Answer

Most hormones are made of chains of amino acids and are therefore

Correct AnswerverifiedShow Answer

How does aging affect the endocrine system

Correct AnswerverifiedShow Answer

-This figure shows an example of regulation of hormone secretion by a negative feedback loop.The large box labeled 1 represents the initial stimulus.What endocrine glands are indicated by the letters d and e

Correct AnswerverifiedShow Answer

Each of the body's blood-borne hormones comes from the major endocrine glands,namely,the pineal,pituitary,thyroid,parathyroid,or adrenal glands.

Correct AnswerverifiedShow Answer

Generally,the shorter the half-life of a hormone

Correct AnswerverifiedShow Answer

The three distinct areas of the anterior pituitary are the

Correct AnswerverifiedShow Answer

Lipophilic hormones bind to ___________ receptors of target cells.

Correct AnswerverifiedShow Answer

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Cortisol binds to _ receptors and has the effect of blood glucose levels.

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