John Smith works outdoors in the winter at a ski resort. His thyroid hormone levels are
A. lower in the winter to conserve body heat.
B. higher in the winter to increase body temperature.
C. lowered in the summer after his job to decrease body temperature.
D. increased in the summer after his job to increase body temperature.
E. unaffected by his job.
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Question 2) T3 and T4 are stored in the lumen of thyroid follicles as part of the _____ molecule.
A. thyrotropin
B. thyroid-stimulating hormone
C. thyroxine-binding protein
D. thyroglobulin
E. calcitonin
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Question 3) Gonadotropin-releasing hormone (GnRH) regulates the release of
A. prolactin and oxytocin.
B. follicle-stimulating hormone and luteinizing hormone.
C. estrogen and testosterone.
D. progesterone and prolactin.
E. thyrotropin-releasing hormone and thyroid-stimulating hormone.
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Question 4) Osmoreceptor cells in the hypothalamus are involved in the secretion of
A. growth hormone.
B. aldosterone.
C. antidiuretic hormone.
D. adrenocorticotropic hormone.
E. parathyroid hormone.
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Question 5) Which of the following ions is necessary for thyroid hormone production?
A. potassium
B. calcium
C. iodine
D. sodium
E. chlorine
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Question 6) Which of the following would apply to the description of a thyroid follicle?
A. walls contain a single layer of parafollicular cells
B. center is called the isthmus
C. stores thyroid hormone
D. small capillary networks
E. spheres with walls of a single layer of cuboidal epithelial cells
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Question 7) Hypersecretion of which of the following hormones causes increased metabolic rate, sensitivity to heat, weight loss, and exophthalmos?
A. parathyroid hormone
B. estrogen
C. cortisol
D. thyroid hormone
E. growth hormone
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Question 8) Synthesis of progesterone in the ovary and testosterone in the testis is stimulated by
A. LH (luteinizing hormone).
B. MSH (melanocyte-stimulating hormone).
C. TSH (thyroid-stimulating hormone).
D. ACTH (adrenocorticotropic hormone).
E. FSH (follicle-stimulating hormone).
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Question 9) Which hormone is required for ovulation and formation of the corpus luteum?
A. FSH (follicle-stimulating hormone)
B. LH (luteinizing hormone)
C. TSH (thyroid-stimulating hormone)
D. prolactin
E. MSH (melanocyte-stimulating hormone)
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Question 10) During a race, a long-distance runner twisted his ankle. He finished the race without feeling any pain in his ankle. This lack of the perception of pain could be the result of an increase in
A. gonadotropins.
B. lipotropins.
C. somatotropins.
D. epinephrine.
E. beta endorphins.
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