Transcript ch 45 clicker questions

CLICKER QUESTIONS
For CAMPBELL BIOLOGY, NINTH EDITION
Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Chapter 45
Hormones and the Endocrine
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Questions prepared by
William Wischusen
Louisiana State University
John Lepri
University of North Carolina, Greensboro
© 2011 Pearson Education, Inc.
All hormones
a) are lipid-soluble molecules.
b) are protein molecules.
c) elicit the same biological response from all of their
target cells.
d) are carried to target cells in the blood.
e) are produced by endocrine glands.
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Nitric oxide and epinephrine
a) are both involved in the "fight-or-flight" response.
b) bind the same receptors.
c) both function as neurotransmitters.
d) both cause a reduction in the blood levels of
glucose.
e) both function as steroid hormones.
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Organ X produces hormone A, which
stimulates target cells Y to produce
product Z. Negative-feedback regulation
is best represented by observing that
a) product Z does not affect X’s production
of A.
b) product Z stimulates Y’s production of Z.
c) source Y runs out of substrates to make
Z.
d) source X has receptor proteins for Z.
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Thyroxine hormones exert negative feedback
on the production of thyroid stimulating
hormone (TSH), as best exemplified by
a) I.
b) II.
c) III.
d) IV.
Thyroxines
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Hormones are transported throughout the
circulatory system, but they affect only specific
tissues or cells because
a) only the capillaries at the target will let the hormones
out of the blood.
b) only the target cells have receptors for the hormone.
c) the nontarget tissues catabolize or destroy the
hormones.
d) the hormones know where their targets are located.
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Epinephrine causes the constriction of some
blood vessels and the dilation of others
because
a) the target cells have different receptors for the same
hormone with different signal transduction pathways.
b) the vasoconstriction targets are incapable of
vasodilation.
c) the target cells have the same receptor and the same
signal transduction pathway.
d) the hormone is able to enter the cytosol of the
vasodilation targets but not the vasoconstriction targets.
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Thyroid hormones exert negative-feedback
effects at all levels of the hypothalamicpituitary-thyroid gland axis, so we should
expect to find thyroid hormone receptors at
a) the hypothalamus.
b) the anterior pituitary gland.
c) the targets of thyroid hormones throughout the
body.
d) all of the above.
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Oxytocin, the milk-release hormone secreted
from nerve endings (axon terminals) in the
posterior pituitary gland, is synthesized in
a) the anterior pituitary gland.
b) the hypothalamus.
c) the mammary glands.
d) the posterior pituitary gland.
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The role of the pancreas as an endocrine
gland that mediates glucose homeostasis is of
great importance to health, but a patient whose
pancreas has been surgically removed also
loses
a) the body’s source of epinephrine.
b) the body’s source of growth hormones.
c) the body’s source of most of its digestive enzymes.
d) the ability to coordinate swallowing and breathing.
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In the chemical communication system of the
developing insect, the larval forms are most likely
to persist in those individuals that have high
levels of
a) juvenile hormone.
b) ecdysteroid hormones.
c) prothoraciotropic hormone.
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The gas that causes vasodilation by relaxing
vascular smooth muscle, thus enabling male
sexual function, is
a) carbon dioxide.
b) nitric oxide.
c) carbon monoxide.
d) oxygen.
e) nitrogen.
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