Question 1

The half-life of a hormone is

Accepted Answer

A)  one-half of the time it takes to synthesize the chemical messenger molecule.
B)  the time necessary to reduce the hormone concentration in the blood to half of what had been secreted.
C)  half the time until the hormone molecule dissolves.
D)  half of the duration of the hormone's effects on its target cells throughout the body.E) A) and D)
F) A) and C)

Question 2

The parathyroid glands are located

Accepted Answer

A)  just below the thalamus.
B)  within the thymus.
C)  above the kidneys.
D)  anterior to the thyroid gland.
E)  posterior to the thyroid gland.F) A) and C)
G) All of the above

Question 3

Steroids,peptides,and nucleic acids are the three classes of hormones.

Accepted Answer

A) True 
 B)False

Question 4

Which lobe of the pituitary is larger and secretes more hormones

Accepted Answer

A)  Anterior pituitary
B)  Posterior pituitaryC) A) and B)
D) undefined

Question 5

Glucagon and insulin work _________ on blood glucose levels.

Accepted Answer

A)  antagonistically
B)  permissively
C)  synergisticallyD) All of the above
E) A) and B)

Question 6

The posterior pituitary does not produce its own hormones but stores hormones produced by the hypothalamus.

Accepted Answer

A) True 
 B)False

Question 7

The hormones and neurotransmitters released by the endocrine and nervous systems are chemical substances referred to as _________.

Accepted Answer

The answer of The hormones and neurotransmitters released by the...

Question 8

Alpha cells of the pancreas secrete the hormone _________.

Accepted Answer

The answer of Alpha cells of the pancreas secrete the...

Question 9

The two hormones released from the posterior pituitary are

Accepted Answer

A)  oxytocin and antidiuretic hormone.
B)  thyrotropin-releasing hormone and corticotropin-releasing hormone.
C)  prolactin and growth hormone.
D)  prolactin and vasopressin.
E)  follicle-stimulating hormone and leutenizing hormone.F) None of the above
G) B) and E)

Question 10

Steroid hormones are lipids,derived from

Accepted Answer

A)  cholesterol.
B)  glycerol.
C)  amines.
D)  polypeptides.
E)  nucleic acids.F) A) and B)
G) A) and C)

Question 11

Which hormones are collectively called the gonadotropins

Accepted Answer

A)  Prolactin and oxytocin
B)  Antidiuretic hormone and oxytocin
C)  Follicle-stimulating hormone and luteinizing hormone
D)  Follicle-stimulating hormone and growth hormone
E)  Thyroid-stimulating hormone and adrenocorticotropic hormoneF) A) and D)
G) B) and E)

Question 12

The reaction time for endocrine effects is generally measured in milliseconds.

Accepted Answer

A) True 
 B)False

Question 13

The thyroid gland is located

Accepted Answer

A)  anterior to the atria of the heart.
B)  immediately anterior to the trachea.
C)  immediately superior to the larynx.
D)  immediately posterior to the cricoid cartilage.E) B) and C)
F) None of the above

Question 14

The pituitary gland is located _________ to the hypothalamus and is connected by the ________.

Accepted Answer

A)  superior,thalamus
B)  inferior,infundibulum
C)  inferior,epithalamus
D)  posterior,infundibulum
E)  superior,pars nervosa and primary plexusF) A) and B)
G) A) and E)

Question 15

Aldosterone release can be triggered by the presence of the blood-borne messenger angiotensin II or by low levels of sodium,and so its secretion regulation is said to be

Accepted Answer

A)  purely neural.
B)  both hormonal and humoral.
C)  both antagonistic and synergistic.
D)  both neural and synergistic.
E)  purely hormonal.F) B) and C)
G) All of the above

Question 16

Two regions of the hypothalamus that are associated with the posterior pituitary are the

Accepted Answer

A)  primary plexus and pars distalis.
B)  paraventricular nucleus and supraoptic nucleus.
C)  supraoptic nucleus and pars distalis.
D)  primary plexus and paraventricular nucleus.
E)  pars tuberalis and pars intermedia.F) B) and E)
G) C) and D)

Question 17

Thyroid-stimulating hormone (TSH) is secreted by the

Accepted Answer

A)  hypothalamus,and it targets cells of the posterior pituitary gland
B)  hypothalamus,and it targets cells of the anterior pituitary gland.
C)  anterior pituitary,and it targets follicular cells of the thyroid gland.
D)  posterior pituitary,and it targets parafollicular cells of the thyroid gland.
E)  thyroid gland,and it targets cells of the parathyroid gland.F) All of the above
G) A) and D)

Question 18

Like proteins,eicosanoids are synthesized on ribosomes in a process that involves transcription and translation.

Accepted Answer

A) True 
 B)False

Question 19

Thyroid hormone is somewhat unique in that it is a

Accepted Answer

A)  biogenic amine that is lipid-soluble.
B)  protein hormone that is water-soluble.
C)  steroid hormone that is water-soluble.
D)  steroid hormone that is lipid-soluble.
E)  monoamine that is water-soluble.F) C) and D)
G) A) and D)

Question 20

The term down-regulation refers to the process by which

Accepted Answer

A)  a glandular cell decreases the amount of hormone it secretes.
B)  a large amount of hormone shuts down all metabolic activity in a target cell.
C)  a cell decreases the number of receptors it has for a hormone.
D)  a carrier protein increases the rate of degradation for a hormone and thereby decreases its blood concentration.
E)  a carrier protein decreases the rate of degradation of the protein it ferries.F) A) and D)
G) C) and E)

Exam 17: Endocrine System

Aldosterone release can be triggered by the presence of the blood-borne messenger angiotensin II or by low levels of sodium,and so its secretion regulation is said to be

Correct AnswerverifiedShow Answer

The parathyroid glands are located

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The pituitary gland is located _________ to the hypothalamus and is connected by the ________.

Correct AnswerverifiedShow Answer

The half-life of a hormone is

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The thyroid gland is located

Correct AnswerverifiedShow Answer

Glucagon and insulin work _________ on blood glucose levels.

Correct AnswerverifiedShow Answer

The term down-regulation refers to the process by which

Correct AnswerverifiedShow Answer

Thyroid hormone is somewhat unique in that it is a

Correct AnswerverifiedShow Answer

The reaction time for endocrine effects is generally measured in milliseconds.

Correct AnswerverifiedShow Answer

Steroids,peptides,and nucleic acids are the three classes of hormones.

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Alpha cells of the pancreas secrete the hormone _________.

Correct AnswerverifiedShow Answer

Which lobe of the pituitary is larger and secretes more hormones

Correct AnswerverifiedShow Answer

The posterior pituitary does not produce its own hormones but stores hormones produced by the hypothalamus.

Correct AnswerverifiedShow Answer

Like proteins,eicosanoids are synthesized on ribosomes in a process that involves transcription and translation.

Correct AnswerverifiedShow Answer

Thyroid-stimulating hormone (TSH) is secreted by the

Correct AnswerverifiedShow Answer

Two regions of the hypothalamus that are associated with the posterior pituitary are the

Correct AnswerverifiedShow Answer

The hormones and neurotransmitters released by the endocrine and nervous systems are chemical substances referred to as _________.

Correct AnswerverifiedShow Answer

Steroid hormones are lipids,derived from

Correct AnswerverifiedShow Answer

The two hormones released from the posterior pituitary are

Correct AnswerverifiedShow Answer

Which hormones are collectively called the gonadotropins

Correct AnswerverifiedShow Answer

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The pituitary gland is located _ to the hypothalamus and is connected by the .

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