ch18 - Exam Name MULTIPLE CHOICE Choose the one alternative...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) All of the following are true of the nervous system, except that it doesn't A) respond specifically to stimuli. B) respond rapidly to stimuli. C) communicate by the release of neurotransmitters. D) respond with motor output. E) function independently of the endocrine system. 1) 2) Endocrine cells A) release their secretions onto an epithelial surface. B) are a type of nerve cell. C) are modified connective - tissue cells. D) contain few vesicles. E) release their secretions directly into body fluids. 2) 3) Hormones known as "catecholamines" are A) lipids. B) steroids. C) peptides. D) derivatives of reproductive glands. E) derivatives of the amino acid tyrosine. 3) 4) Peptide hormones are A) composed of amino acids. B) lipids. C) produced by the suprarenal glands. D) chemically related to cholesterol. E) derived from the amino acid tyrosine. 4) 5) All of the following are true of steroid hormones, except that they A) are produced by reproductive glands. B) bind to receptors within the cell. C) are lipids. D) are produced by the suprarenal medulla. E) are derived from cholesterol. 5) 6) Each of the following hormones is an amino acid derivative, except A) melatonin. B) epinephrine. C) thyroid hormone. D) thyroid - stimulating hormone. E) norepinephrine. 6) 1
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7) Extracellular membrane receptors are used by which of the following types of hormones? A) catecholamines B) peptide hormones C) eicosanoids D) thyroid E) A, B, and C only 7) 8) Steroid hormones A) cannot diffuse through cell membranes. B) are proteins. C) bind to receptors in the nucleus of their target cells. D) remain in circulation for relatively short periods of time. E) are transported in the blood dissolved in the plasma. 8) 9) When a catecholamine or peptide hormone binds to receptors on the surface of a cell, the A) hormone is transported to the nucleus where it alters the activity of DNA. B) cell membrane becomes depolarized. C) second messenger appears in the cytoplasm. D) cell becomes inactive. E) hormone receptor complex moves into the cytoplasm. 9) 10) Hormones can be divided into different groups based on their chemistry. These categories include A) peptides. B) amino acid derivatives. C) eicosanoids. D) steroids. E) all of the above 10) 11) Hormonal actions on cells include those that affect A) synthesis of enzymes. B) activities of enzymes. C) quantities of enzymes. D) gating of ion channels. E) any of the above 11) 12) The link between a first messenger and a second messenger in a cell that responds to peptide hormones is usually A) a G protein. B) cAMP.
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ch18 - Exam Name MULTIPLE CHOICE Choose the one alternative...

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