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20 Cards in this Set
- Front
- Back
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1. Which is true of extracellular communication?
A. no physical contact is necessary for signal transduction B. to relay a signal, a post-receptor effect is necessary C. receptors are made up of lipids D. it is mediated by ion chelates E. is not necessary for normal physiological function |
B. to relay a signal, a post-receptor effect is necessary
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2. Define autocrine.
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Self-regulating hormones.
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3. Define paracrine.
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Hormones to regulate neighboring cells.
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4. Define endocrine.
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Hormones to regulate at a distance.
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5. Which is true of hydrophilic hormones?
A. they are the least common B. they can be derivatives of arachidonic acid C. does not require interaction with blood proteins D. are insoluble in blood E. response on cells is delayed |
C. does not require interaction with blood proteins
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6. Which is true of hydrophobic hormones?
A. they are the most common B. includes catecholamines C. response on cells is fast D. uptake and degradation is delayed due to protein interactions E. includes peptides |
D. uptake and degradation is delayed due to protein interactions
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7. Define positive feedback.
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A run-away physiological process.
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8. Define negative feedback
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A self-limiting physiological process.
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9. Which is not a method of hormone disposal from plasma?
A. internalization B. proteolysis C. oxidation D. sulfation E. leak |
E. leak
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10. List the steps of peptide hormone synthesis.
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Transcription, translation, pre-prohormone, prohormone, active hormone.
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11. Which is true of hypothalamus function?
A. secretes growth hormone B. is a master endocrine system C. receives signals from the anterior pituitary D. has no portal system E. has three sets of neuroendocrine cells |
B. is a master endocrine system
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12. Which accurately describes the regulation of hypothalamus on pituitaries.
A. regulation of the posterior pituitary is through a portal system B. the anterior pituitary is an extension of the hypothalamus C. both pituitaries require releasing hormones D. releasing hormones stimulate the anterior pituitary E. the posterior pituitary requires releasing hormones to function |
D. releasing hormones stimulate the anterior pituitary
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13. What are the hormones secreted from the posterior pituitary.
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Oxytocin, vasopressin.
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14. Which is true of vasopressin
A. is also called anti-diuretic hormone B. is lipid derived C. produced by the same cells that produce oxytocin D. is secreted into tissues as a paracrine agent E. is derived from tyrosine |
A. is also called anti-diuretic hormone
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15. Which is true of vasopressin
A. is secreted by epithelial (glandular ) cells B. is secreted by the anterior pituitary C. is secreted by neurosecretary cells D. is produced as is, the active form E. is produced by follicles |
C. is secreted by neurosecretary cells
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16. Which is true of vasopressin
A. factors stimulating secretion include blood pressure increase B. target tissues are GI tracts C. ADH binds to a nuclear receptor D. ADH activates a PLC mediated signaling E. Increases permeability of kidney duct to water |
E. Increases permeability of kidney duct to water
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17. Which is true of vasopressin
A. is involved with metabolism B. is involved with water regulation C. inserts sodium pumps into the membrane of duct cells D. promotes water elimination E. stimulated by decreased osmolality |
B. is involved with water regulation
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18. Which is true of oxytocin
A. is synthesized as a prohormone B. is secreted by glandular cells C. secreted by cells that also secrete ADH D. plays a major role in both sexes E. binds to nuclear receptors |
A. is synthesized as a prohormone
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19. Which is true of oxytocin
A. stimulates increased lipid metabolism B. stimulates smooth muscle contraction of uterus C. binds to ligand gated ion channels D. increases cellular cGMP levels E. simulates milk production in adult mammary glands |
B. stimulates smooth muscle contraction of uterus
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20. Which is true of oxytocin
A. Decreases cellular cAMP levels B. Is derived from tryptophan C. Cells secreting oxytocin are a part of the hypothalamus D. Active oxytocin is a 128 amino acid peptide E. Is one of three main peptide hormones secreted by the posterior pituitary |
C. Cells secreting oxytocin are a part of the hypothalamus
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