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BIO201_MH_V3
Topic 16: Functional Organization of the Endocrine System
Started on Friday, September 10, 2021, 10:43 AM
State
... [Show More] Finished
Completed on Friday, September 10, 2021, 11:20 AM
Time taken 36 mins 44 secs
Grade 35.00 out of 35.00 (100%)
Question 1
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When a hormone binds to a membrane–bound receptor and activates G proteins,
Select one:
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.
Question 2
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Most endocrine glands communicate with their target tissues using _____ signals.
Select one:
a. frequency-modulated
b. amplitude-modulated
c. pitch-modulated
d. resonance-modulated
Question 3
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Which of the following occurs when a hormone binds to a nuclear receptor?
Select one:
a. activation of cyclic AMP
b. activation of mRNA synthesis
c. increased lipid synthesis by ribosomes
d. opens membrane channels
e. alters membrane permeability
Question 4
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All of the following chemical messengers may be listed in multiple functional classes except
Select one:
a. Eicosanoids
b. Epinephrine
c. Prostaglandins
d. Acetylcholine
Question 5
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Receptors for most lipid-soluble hormones are located
Select one:
a. in the cytoplasm of their target cells.
b. on the plasma membrane of their target cells.
c. in the lysosomes of their target cells.
d. on the nuclear membrane of their target cells.
e. in the nucleus or cytoplasm of their target cells.
Question 6
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Parathyroid hormone is released when blood calcium levels decrease. This is an example
of control by __________ stimuli.
Select one:a. hormonal
b. neural
c. humoral
d. visceral
Question 7
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A chemical produced in a cell that activates specific processes in response to a hormone
interaction with a membrane-bound receptor is referred to as a(n) _____.
Select one:
a. hormone response element
b. transcription factor
c. messenger RNA
d. intracellular mediator
Question 8
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In general, the response of target cells to endocrine stimulation is _______ than their
response to nervous stimulation.
Select one:
a. faster and briefer
b. slower and more prolonged
c. more accurated. more restricted to a small area of the body
e. more intense
Question 9
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Increased testosterone levels reduce the secretion of gonadotropin-releasing hormone from
the anterior pituitary. This is an example of
Select one:
a. inhibition of hormone release by humoral stimuli
b. inhibition of hormone release by neural stimuli
c. inhibition of hormone release by external stimuli
d. inhibition of hormonal release by environmental stimuli
e. inhibition of hormone release by hormonal stimuli
Question 10
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David has been feeling tired lately, and after having blood work completed, it shows
elevated TSH, low iodine, and low thyroid hormone levels. Predict the possible cause from
the choices below.
Select one:
a. David could possibly have a thyroid tumor.
b. David may have iodine deficiency that is causing his thyroid to produce too little thyroid
hormone.c. David could have a pituitary gland tumor.
d. Too little information is given to determine the cause.
Question 11
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Which of the following is NOT a regulatory function of the endocrine system?
Select one:
a. Regulates the rate of metabolism.
b. Controls development and functions of the reproductive system.
c. Regulates equilibrium and balance from the inner ear.
d. Prepares the body for physical activity and stress.
e. Regulates heart rate and blood pressure.
Question 12
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All of the following are regulatory functions of the endocrine system except
Select one:
a. labor contractions.
b. development of tissues.
c. immune functions.
d. metabolic rate.
e. thermoregulation.
Question 13Correct
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Which of the following is NOT a regulatory function of the endocrine system?
Select one:
a. Regulates water balance by controlling the solute concentration of the blood.
b. Regulates skeletal muscle contraction strength.
c. Regulates satiation and the breakdown of food into individual nutrients.
d. Regulates the rate of metabolism.
e. Regulates the levels of nutrients such as glucose in the blood.
Question 14
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Which of the following situations might be the result of hypersecretion of glucocorticoids?
Select one:
a. weight loss
b. hypoglycemia
c. depression of the immune response
d. increased plasma levels of ACTH
e. proteins and fats are unused
Question 15
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Describe the mechanism of action of thyroid hormones.
Select one:
a. These hormones interact with membrane signaling proteins.
b. Thyroid hormones bind to molecules of the cytoskeleton in the cell cytoplasm.
c. Thyroid hormones bind to epithelial cell membranes that line the intestine.
d. These hormones bind to molecules of the cytoskeleton in the cell cytoplasm.
Question 16
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The hypothalamohypophysial portal system carries hormones from the
Select one:
a. anterior pituitary to the hypothalamus.
b. posterior pituitary to the hypothalamus.
c. hypothalamus to the anterior pituitary.
d. hypothalamus to the posterior pituitary.
e. anterior pituitary to posterior pituitary.
Question 17
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All of the following classes of hormones are secreted by the adrenal cortex except
Select one:
a. mineralcorticoids.
b. glucocorticoids.
c. androgens.
d. steroid hormones.
e. water-soluble peptides.
Question 18
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The embryonic origin of the posterior pituitary gland is
Select one:
a. epithelium from the oral cavity.
b. nervous tissue from the area of the hypothalamus.
c. an outpocket of the nasal cavity.
d. glandular tissue from the cerebrum.
Question 19
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During exercise, the energy necessary to sustain skeletal muscle cell contraction comes
from
Select one:a. increased insulin production.
b. increased epinephrine and glucagon release.
c. decreased sympathetic nervous system activity.
d. storing glucose as glycogen.
e. conservation of glucose.
Question 20
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All of the following are changes due to age-related decreases in endocrine
secretions, except
Select one:
a. decrease in muscle mass.
b. decrease in bone mass.
c. change in sleeping patterns.
d. increased susceptibility to infection.
e. inability to regulate blood glucose levels. [Show Less]