7 Which of the following sets of hormones are antagonists? a. Insulin and glucag

Question

7 Which of the following sets of hormones are antagonists? a. Insulin and glucagon. b. Calcitonin and cortisol. c. Epinephrine and norepinephrine d. Growth hormone and thyroxine. Matching: Match the following endocrine organs with the hormone(s) each secretes. Pineal gland Thyroid gland Pancreas Thymus Hypothalamus Adrenal cortex Anterior pituitary Adrenal medulla A Antidiuretic hormone and axytocin B. Insulin and glucagon C. Aldosterone and cortisol D. Epinephrine and norepinephrine E. Thyroxine, triodothyronine, and calcitonin F Thyroid-stimulating hormone, growth hormone G. Melatonin H. Thymosin and thymopoietin Which of the following is true regarding endocrine organ histology? a. The thyroid gland consists of rings of stratified cuboidal follicle cells surrounding collaid b. The pancreas has an exocrine portion consisting of pancreatic islets and an endocrine portion consisting of acinar c. The adrenal cortex has three zones of cels that secrete steroid hormones d. The adrenal medulla is modified nervous tissue of the parasympathetic nervous system. 9 16 after 10 in a negative feedback loop, you would expect secretion from an endocrine gland to homeostasis has been restored. a. decrease b. increase c. remain the same

Explanation / Answer

7. Which of the following sets of hormones are antagonists?

(a) insulin and glucagon.

8. Matching:

(1). Pineal gland - (G) Melatonin.

The pineal gland produces melatonin ,a serotonin derived hormone which modulates sleep patterns in both circadian and seasonal cycles.

(2). Thyroid gland - (E) thyroxine, triiodothyronine and calcitonin.

(3). Pancreas - (B) insulin and glucagon.

(4). Thymus - (H) thymosin and thymopoietin.

(5). Hypothalamus - (A) antidiuretic hormone and oxytocin.

(6). Adrenal cortex - (C) aldosterone and cortisol.

(7). Anterior pituitary - ( F) thyroid stimulating hormone, growth hormone.

(8). Adrenal medulla - (D) epinephrine and norepinephrine.

9. Which of the following is not true regarding endocrine histology?

(b) the pancreas has an exocrine portion consisting of pancreatic islets and an endocrine portion consisting of acinar cells.

10. In a negative feedback loop, you would expect secretion from an endocrine glands to homeostasis has been restored:

(a) decrease

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