Excessive growth hormone secretion in an adult leads to
a. gigantism.
b. disproportionate growth resulting in thickened bones and coarse features.
c. no symptoms because growth is already complete.
d. acromegaly.
e. both (b) and (d) above.
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Question 2) The growth hormone signals activity of the ____ of a long bone to influence its length.
a. articular cartilage.
b. endosteum.
c. epiphyseal plate.
d. medullary cavity.
e. periosteum.
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Question 3) Growth hormone
a. directly stimulates bone growth.
b. exerts its effects on bones via somatomedin release.
c. promotes closure of the epiphyseal plate.
d. both (a) and (c) above.
e. both b) and (c) above.
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Question 4) GH deficiency:
a. is always caused by pituitary problems
b. results in dwarfism in a child
c. results in acromegaly in a child
d. result in gigantism
e. is the primary cause of Lardon dwarfism
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Question 5) Growth hormone
a. closes the epiphyseal plate of long bones.
b. promotes hypertrophy and hyperplasia.
c. secretion is stimulated by an increased blood glucose level.
d. is the only factor responsible for governing the growth of an individual.
e. all of these answers.
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Question 6) The hypothalamo-hypophyseal portal system
a. carries vasopressin and oxytocin from the hypothalamus to the posterior pituitary for storage.
b. carries hypophysiotropic hormones from the hypothalamus to the posterior pituitary to control the release of posterior pituitary hormones.
c. carries hypophysiotropic hormones from the hypothalamus to the anterior pituitary to control the release of anterior pituitary hormones.
d. carries vasopressin and oxytocin from the hypothalamus to the anterior pituitary to control the release of anterior pituitary hormones.
e. both (b) and (c) above.
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Question 7) The hypothalamo-hypophyseal portal system
a. carries anterior pituitary hormones from the anterior pituitary gland to the hypothalamus to regulate the release of hypophysiotropic hormones.
b. diverts blood directly to the pituitary, completely bypassing the hypothalamus.
c. carries hypophysiotropic hormones from the hypothalamus to the anterior pituitary to regulate anterior pituitary hormone secretion.
d. carries the anterior pituitary hormones into the general systemic circulation.
e. connects the hypothalamus and posterior pituitary.
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Question 8) Which one of the following hormones signals the kidneys to control water balance?
a. vasopressin
b. ACTH
c. TRH
d. somatostatin
e. prolactin-inhibiting hormone
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Question 9) Which of the following statements concerning hypophysiotropic hormones is correct?
a. each hypophysiotropic hormone influences only one anterior pituitary hormone.
b. all hypophysiotropic hormones stimulate the release of anterior pituitary hormones.
c. hypophysiotropic hormones are also produced outside of the hypothalamus, where they serve different functions.
d. hypophysiotropic hormones are secreted into the general circulation.
e. none of these answers.
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Question 10) LH stimulates the
a. cells that destroy the cells of Leydig.
b. enlargement of the follicles.
c. development of the hypothalamus.
d. formation of the corpus luteum.
e. water balance in the kidney.
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