BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 31, Problem 4SA
Summary Introduction
Introduction:
Steroid hormones are grouped into two classes: corticosteroids and sex steroids. Corticosteroids are synthesized and released by adrenal cotex whereas gonads or placenta releases sex steroids.
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What do steroid and peptide hormones typically have in common? (A) their solubility in cell membranes (B) their requirement for travel through the bloodstream (C) the location of their receptors (D) their reliance on signal transduction in the cell
Functions of hormones include which of the following? a. control rates of certain chemical reactions b. transport substances across cell membranes c. help regulate water and electrolyte balances d. all of the above
Which of the following statements about polypeptide hormones is false?a. They bind to receptors located on the cell membrane.b. Most of them are lipophilic.c. They are the most abundant class of hormones.d. They normally activate second messengers.e. They bind noncovalently to receptors.
Chapter 31 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
Hormones secreted by endocrine glands are _________________. *
A. passed through ducts
B. circulated in the blood
C. produced in large amounts
D. cause damage to the body
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Which of the following statements about hormones is not correct?
A. The persistance of a hormone in the blood is usually of short duration.B. The time required for the onset of hormonal effects can vary
C. Organ responses to hormones occur as soon as receptors are bound.
D. The duration of hormone action is variable.
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Which of the following is a property common between endocrine hormones, paracrine hormones, and pheromones?
A. They all operate internally within an organism to stimulate different cellular responses.
B. They are all secreted by dedicated glands within the endocrine system.
C. They are all water-soluble hormones
D. Both A and B
E. None of the above
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Which of the following is an important function of the endocrine system?
a. Provides mechanisms for rapid response to changes in the body
b. Provides mechanisms that control the nervous system
c. It inhibits nervous system action on muscles and glands
d. It maintains a contant yet dynamic internal fluid environment
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Which of the following is true about lipophilic hormones?
a. They are freely soluble in the blood.
b. They require a transport protein in the bloodstream.
c. They cannot enter their target cells.
d. They are rapidly deactivated after binding to their receptors.
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The actions of lipid-soluble hormones include
a. activation or inhibition of enzymatic pathways.
b. binding with a hormone-responsive element.
c. muscle contraction or relaxation. d. stimulation of cellular secretions.
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An increase in epinephrine results in:
a.
An increase activity of insulin.
b.
An increased activity of protein kinase A.
c.
A decreased level of cAMP.
d.
An increase activity of protein phosphatase.
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The response of a target cell to a hormone depends ona. the receptor in the target cell that binds thehormone.b. which second messengers are activated in the cell.c. the type of cell.d. all of these factors.
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Hormones can be released into the blood ...
a) ... in large quantities in response to stimuli.
b) ... quite continuously.
c) ... in cyclically increasing and decreasing quantities.
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Which of these endocrine glands is most directly involved in immune function? a. the pancreas b. the thymus c. the adenohypophysis d. the adrenal glands e. the thyroid gland
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Which of the following observations can be explained by the properties of hormone receptors?
a) A certain tissue can react to more than one hormone
b) A certain hormone affects only a specific tissue, not all tissues
c) Some tissues react very quickly to a certain hormone, other tissues take many hours to react to the same hormone
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Pick the neurohormone from the list below
a) Thyroxine
b)growth hormone
c) prolactin
d) antidiuretic hormone
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