Question 1

Consider the following events in the nuclear receptor model: (1)  Hormone receptor complex binds to DNA.
(2)  Messenger RNA directs synthesis of specific proteins.
(3)  Hormone binds to receptors in the nucleus (sometimes in the cytoplasm) 
(4)  Messenger RNA synthesis is activated.
(5)  Synthesized proteins produce the response of the cell.
Which of these events occurs in the nucleus?

Accepted Answer

A)   1, 3, 5
B)   1, 3, 4
C)   1, 2, 3
D)   3, 4, 5
E)   All events occur in the nucleus.F) C) and E)
G) A) and D)

Question 2

Which chemical type of hormone has a longer half-life?

Accepted Answer

A)   lipid-soluble
B)   protein
C)   water-soluble
D)   amino acid derivativeE) A) and B)
F) A) and C)

Question 3

-What is "D" on the diagram?

Accepted Answer

A)   pancreas
B)   adrenals
C)   pituitary
D)   thyroid
E)   thymusF) B) and E)
G) None of the above

Question 4

Match the description with the type of receptor model.
-messenger RNA synthesis regulated

Accepted Answer

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

Question 5

Match the description with the type of receptor model.
-used by most lipid-soluble hormones

Accepted Answer

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

Question 6

Hormones with short half-lives

Accepted Answer

A)   are usually lipid-soluble.
B)   are maintained at relatively constant levels.
C)   have concentrations that increase slowly.
D)   regulate activities of delayed onset and long duration.
E)   regulate activities of rapid onset and short duration.F) A) and D)
G) B) and C)

Question 7

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 C)
F) C) and D)

Question 8

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) B) and E)
G) A) and B)

Question 9

-The illustration depicts five types of intercellular chemical signals. What kind of signal does "D" represent?

Accepted Answer

A)   paracrine
B)   neurotransmitter
C)   neuropeptide
D)   autocrine
E)   endocrineF) D) and E)
G) C) and D)

Question 10

When a hormone binds to a membrane-bound receptor and activates G proteins,

Accepted Answer

A)   ion channels could be opened.
B)   IP3 may be activated.
C)   cyclic AMP production may be increased.
D)   DAG may be activated.
E)   All of the choices may occur from activated G proteins.F) B) and D)
G) A) and E)

Question 11

Steroid hormones

Accepted Answer

A)   bind to membrane receptors.
B)   diffuse easily through the plasma membrane.
C)   act by activating cAMP.
D)   are inactivated by phosphodiesterase.
E)   are water soluble.F) A) and B)
G) A) and E)

Question 12

A water-soluble hormone binds to its receptor on the plasma membrane. Arrange the events that follow in correct sequence. (1)  alpha subunit-GTP complex alters cell activity
(2)  GTP binds to the alpha subunit replacing GDP
(3)  G-protein subunits separate from the receptor
(4)  alpha subunit separates from other two subunits
(5)  G-protein subunits bind to the receptor

Accepted Answer

A)   5, 2, 3, 4, 1
B)   4, 2, 1, 3, 5
C)   5, 2, 1, 4, 3
D)   5, 4, 2, 1, 3
E)   3, 4, 1, 2, 5F) A) and B)
G) A) and C)

Question 13

Hormonal secretion can be regulated by

Accepted Answer

A)   the action of a substance other than a hormone.
B)   the nervous system.
C)   other hormones.
D)   All of these choices are correct.
E)   None of these choices is correct.F) B) and C)
G) A) and B)

Question 14

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 E)
G) B) and C)

Question 15

-The illustration depicts five types of intercellular chemical signals. What kind of signal does "C" represent?

Accepted Answer

A)   paracrine
B)   neurotransmitter
C)   neuropeptide
D)   autocrine
E)   endocrineF) B) and D)
G) A) and E)

Question 16

How do most water-soluble hormones travel in the bloodstream?

Accepted Answer

A)   attached to proteins
B)   attached to carbohydrates
C)   attached to amino acids
D)   as free hormonesE) A) and D)
F) C) and D)

Question 17

Which of the following statements regarding hormone transport and distribution is FALSE?

Accepted Answer

A)   Only free hormones can diffuse through capillary walls and bind to target tissues.
B)   Hormones can be transported free in the plasma or bound to plasma proteins.
C)   Plasma protein concentration has no influence on free hormone concentration.
D)   Hormones bind only to certain types of plasma proteins.
E)   All of the statements are true.F) A) and B)
G) D) and E)

Exam 17: Functional Organization of the Endocrine System

Which of the following statements regarding hormone transport and distribution is FALSE?

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
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Hormonal secretion can be regulated by

Correct Answer
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-What is "D" on the diagram?

Correct Answer
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Steroid hormones

Correct Answer
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Correct Answer
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Match the chemical signal with the appropriate description. -endocrine

Correct Answer
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How do most water-soluble hormones travel in the bloodstream?

Correct Answer
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Match the description with the type of receptor model. -used by most lipid-soluble hormones

Correct Answer
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Hormones with short half-lives

Correct Answer
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Which chemical type of hormone has a longer half-life?

Correct Answer
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Match the description with the type of receptor model. -messenger RNA synthesis regulated

Correct Answer
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-The illustration depicts five types of intercellular chemical signals. What kind of signal does "D" represent?

Correct Answer
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-The illustration depicts five types of intercellular chemical signals. What kind of signal does "C" represent?

Correct Answer
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When a hormone binds to a membrane-bound receptor and activates G proteins,

Correct Answer
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Exam 17: Functional Organization of the Endocrine System

Which of the following statements regarding hormone transport and distribution is FALSE?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hormonal secretion can be regulated by

Correct AnswerverifiedShow Answer

-What is "D" on the diagram?

Correct AnswerverifiedShow Answer

Steroid hormones

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Match the chemical signal with the appropriate description. -endocrine

Correct AnswerverifiedShow Answer

How do most water-soluble hormones travel in the bloodstream?

Correct AnswerverifiedShow Answer

Match the description with the type of receptor model. -used by most lipid-soluble hormones

Correct AnswerverifiedShow Answer

Hormones with short half-lives

Correct AnswerverifiedShow Answer

Which chemical type of hormone has a longer half-life?

Correct AnswerverifiedShow Answer

Match the description with the type of receptor model. -messenger RNA synthesis regulated

Correct AnswerverifiedShow Answer

-The illustration depicts five types of intercellular chemical signals. What kind of signal does "D" represent?

Correct AnswerverifiedShow Answer

-The illustration depicts five types of intercellular chemical signals. What kind of signal does "C" represent?

Correct AnswerverifiedShow Answer

When a hormone binds to a membrane-bound receptor and activates G proteins,

Correct AnswerverifiedShow Answer

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Correct AnswerverifiedShow Answer

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