Question 1

Arrange the following events in proper sequence: (1)  The activating hormone interacts with a membrane-bound receptor.
(2)  Cyclic AMP causes the cell to carry out a function characteristic for that specific hormone.
(3)  Adenylyl cyclase catalyzes the transformation of ATP to cyclic AMP.
(4)  Adenylyl cyclase is activated.

Accepted Answer

A)   1, 2, 3, 4
B)   1, 4, 3, 2
C)   3, 4, 2, 1
D)   1, 3, 2, 4
E)   1, 3, 4, 2F) B) and D)
G) C) and E)

Question 2

Most hormones are regulated by

Accepted Answer

A)   negative-feedback mechanisms.
B)   neural-feedback mechanisms.
C)   positive-feedback mechanisms.
D)   hormonal-feedback mechanisms.E) None of the above
F) B) and C)

Question 3

Match the description with the type of receptor model.
-intracellular mediator

Accepted Answer

A)  nuclear receptor model
B)  membrane-bound receptor modelC) A) and B)
D) undefined

Question 4

The endocrine system

Accepted Answer

A)   releases neurotransmitters into ducts.
B)   secretes chemicals that reach their targets through the bloodstream.
C)   communicates via frequency-modulated signals.
D)   contains organs called exocrine glands.
E)   is isolated from the nervous system.F) C) and E)
G) None of the above

Question 5

Sympathetic neurons can serve as ______ stimuli for hormone release from certain endocrine organs.

Accepted Answer

A)   Autocrine
B)   Humoral
C)   Paracrine
D)   NeuralE) C) and D)
F) A) and B)

Question 6

Match the chemical signal with the appropriate description.
-endocrine

Accepted Answer

A)  chemicals produced by neurons that function as hormones
B)  chemicals that act locally on nearby cells
C)  chemical secreted by presynaptic terminal
D)  influences same cell type from which it is secreted
E)  chemical secreted into blood by specialized cells; travels some distance to target tissuesF) C) and D)
G) A) and C)

Question 7

Match the description with the type of receptor model.
-G-protein

Accepted Answer

A)  nuclear receptor model
B)  membrane-bound receptor modelC) A) and B)
D) undefined

Question 8

Match the description with the type of receptor model.
-generally observe a latent period

Accepted Answer

A)  nuclear receptor model
B)  membrane-bound receptor modelC) A) and B)
D) undefined

Question 9

Once a lipid-soluble hormone is conjugated in the liver

Accepted Answer

A)   its half-life is increased.
B)   it can be more quickly eliminated from the body.
C)   it can be stored for later use.
D)   it is actively transported into cells.
E)   it is more slowly eliminated from the body.F) A) and B)
G) B) and E)

Question 10

Which pattern of hormone secretion, often observed in steroid reproductive hormones, will fluctuate over a monthly cycle?

Accepted Answer

A)   acute hormone secretion
B)   episodic hormone secretion
C)   long-term hormone secretion
D)   chronic hormone secretionE) A) and D)
F) B) and C)

Question 11

Match the chemical signal with the appropriate description.
-autocrine

Accepted Answer

A)  chemicals produced by neurons that function as hormones
B)  chemicals that act locally on nearby cells
C)  chemical secreted by presynaptic terminal
D)  influences same cell type from which it is secreted
E)  chemical secreted into blood by specialized cells; travels some distance to target tissuesF) B) and C)
G) A) and B)

Question 12

The release of chemicals from an endocrine or exocrine gland is referred to as ______.

Accepted Answer

A)   Absorption
B)   Diffusion
C)   Filtration
D)   SecretionE) A) and B)
F) None of the above

Question 13

Members of which group of hormones are made from cholesterol?

Accepted Answer

A)   amino acid derivatives
B)   peptides
C)   proteins
D)   steroidsE) B) and D)
F) A) and C)

Question 14

Hormones are intercellular chemical signals that

Accepted Answer

A)   are secreted into the external environment where they act.
B)   affect only non-hormone producing organs or tissues.
C)   help coordinate growth, development and reproduction.
D)   operate primarily by positive feedback.E) None of the above
F) All of the above

Question 15

Up-regulation

Accepted Answer

A)   results in a decrease in the number of receptor sites in the target cell.
B)   produces an increase in the sensitivity of the target cell to the hormone.
C)   is found in target cells that maintain a constant level of receptors.
D)   produces insensitivity to the hormone in the target tissue.
E)   moves the receptors up on the membrane.F) All of the above
G) A) and D)

Question 16

The length of time needed to eliminate half of a dose of a hormone is called its _______ ________.

Accepted Answer

The answer of The length of time needed to eliminate...

Question 17

Which of the following statements is NOT true?

Accepted Answer

A)   The hypothalamus is important to both the nervous and endocrine systems.
B)   Both the nervous and endocrine systems may utilize the same chemical molecule.
C)   Some neurons secrete hormones.
D)   Both the nervous and endocrine systems respond quickly and are active for a long time.E) B) and C)
F) A) and D)

Question 18

Thyroid hormones (TH)  normally travel in the blood both free and bound to TH-binding proteins. What would you expect to see in the blood work of a patient who had a deficiency of TH-binding protein?

Accepted Answer

A)   Normal free TH levels, and low bound TH levels.
B)   Low free TH levels, and low bound TH levels.
C)   Low free TH levels, and normal bound TH levels.
D)   Normal free TH levels, and normal bound TH levels.E) None of the above
F) A) and C)

Question 19

Which pattern of hormone secretion, represented by epinephrine, can have dramatic changes in its concentration and circulating levels?

Accepted Answer

A)   chronic hormone secretion
B)   long-term hormone secretion
C)   episodic hormone secretion
D)   acute hormone secretionE) A) and B)
F) A) and C)

Question 20

Secretion of the hormones ___________ and ____________ exemplify the pattern of chronic hormone secretion.

Accepted Answer

A)   epinephrine and norepinephrine
B)   insulin and glucagon
C)   calcitonin and PTH
D)   estrogen and progesterone
E)   thyrotropin and thyroxineF) A) and C)
G) A) and D)

Exam 17: Functional Organization of the Endocrine System

The release of chemicals from an endocrine or exocrine gland is referred to as ______.

Correct Answer
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Which pattern of hormone secretion, represented by epinephrine, can have dramatic changes in its concentration and circulating levels?

Correct Answer
verified

Members of which group of hormones are made from cholesterol?

Correct Answer
verified

Match the description with the type of receptor model. -intracellular mediator

Correct Answer
verified

Sympathetic neurons can serve as ______ stimuli for hormone release from certain endocrine organs.

Correct Answer
verified

The length of time needed to eliminate half of a dose of a hormone is called its _ __.

Correct Answer
verified

Once a lipid-soluble hormone is conjugated in the liver

Correct Answer
verified

Match the chemical signal with the appropriate description. -autocrine

Correct Answer
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The endocrine system

Correct Answer
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Which of the following statements is NOT true?

Correct Answer
verified

Up-regulation

Correct Answer
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Secretion of the hormones _ and __ exemplify the pattern of chronic hormone secretion.

Correct Answer
verified

Hormones are intercellular chemical signals that

Correct Answer
verified

Match the description with the type of receptor model. -generally observe a latent period

Correct Answer
verified

Match the description with the type of receptor model. -G-protein

Correct Answer
verified

Which pattern of hormone secretion, often observed in steroid reproductive hormones, will fluctuate over a monthly cycle?

Correct Answer
verified

Most hormones are regulated by

Correct Answer
verified

Thyroid hormones (TH) normally travel in the blood both free and bound to TH-binding proteins. What would you expect to see in the blood work of a patient who had a deficiency of TH-binding protein?

Correct Answer
verified

Match the chemical signal with the appropriate description. -endocrine

Correct Answer
verified

Correct Answer
verified

Exam 17: Functional Organization of the Endocrine System

The release of chemicals from an endocrine or exocrine gland is referred to as ______.

Correct AnswerverifiedShow Answer

Which pattern of hormone secretion, represented by epinephrine, can have dramatic changes in its concentration and circulating levels?

Correct AnswerverifiedShow Answer

Members of which group of hormones are made from cholesterol?

Correct AnswerverifiedShow Answer

Match the description with the type of receptor model. -intracellular mediator

Correct AnswerverifiedShow Answer

Sympathetic neurons can serve as ______ stimuli for hormone release from certain endocrine organs.

Correct AnswerverifiedShow Answer

The length of time needed to eliminate half of a dose of a hormone is called its _______ ________.

Correct AnswerverifiedShow Answer

Once a lipid-soluble hormone is conjugated in the liver

Correct AnswerverifiedShow Answer

Match the chemical signal with the appropriate description. -autocrine

Correct AnswerverifiedShow Answer

The endocrine system

Correct AnswerverifiedShow Answer

Which of the following statements is NOT true?

Correct AnswerverifiedShow Answer

Up-regulation

Correct AnswerverifiedShow Answer

Secretion of the hormones ___________ and ____________ exemplify the pattern of chronic hormone secretion.

Correct AnswerverifiedShow Answer

Hormones are intercellular chemical signals that

Correct AnswerverifiedShow Answer

Match the description with the type of receptor model. -generally observe a latent period

Correct AnswerverifiedShow Answer

Match the description with the type of receptor model. -G-protein

Correct AnswerverifiedShow Answer

Which pattern of hormone secretion, often observed in steroid reproductive hormones, will fluctuate over a monthly cycle?

Correct AnswerverifiedShow Answer

Most hormones are regulated by

Correct AnswerverifiedShow Answer

Thyroid hormones (TH) normally travel in the blood both free and bound to TH-binding proteins. What would you expect to see in the blood work of a patient who had a deficiency of TH-binding protein?

Correct AnswerverifiedShow Answer

Match the chemical signal with the appropriate description. -endocrine

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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The length of time needed to eliminate half of a dose of a hormone is called its _ __.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Secretion of the hormones _ and __ exemplify the pattern of chronic hormone secretion.

Correct Answer
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Correct Answer
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