Practice QuizEndocrine Physiology

Physiology Fall 2009

1. An individual suffering from primary hyperthyroidism would exhibit which of the following symptoms?a. increased T3 secretionb. Weight lossc. Hyperpigmentationd. hypothermiae. elevated levels of TSH

2. A fall (decrease) in plasma calcium concentration should result in:

a.Increased parathyroid hormone secretion

b.More conversion of Vitamin D to the active hormone in the kidney

c.More excretion of Ca++ in urined.Decreased resorption of bones by

osteoclasts

3. Which of the following is released from the anterior pituitary gland?

a.Leutinizing hormoneb.Prolactinc.Oxytocind.Thyroid stimulating hormonee.Dopaminef. Vasopressing.Gonadotropin Releasing Hormone

4. Which of the following lead(s) to an increase in cortisol?

a. Increased adrenocortotropic hormoneb.Decreased corticotropin releasing hormonec. Increased thyroid stimulating hormoned.Prolonged exposure to cold e.Psychological anxietyf. Increased levels of Vasopressing. Cytokines from cells of the immune system

5. Cell of the adrenal cortex secrete more aldosterone in response to which of the following ?

a. Increasing plasma concentration of Na+b.Increasing plasma concentration of Ka+c. Angiotensinogend.Angiotensin Ie.Angiontensin IIf. Rening. ACTH

6. Addison’s Disease is characterized by:a.Increased cortisolb.Disturbances in plasma electrolytesc.Decreased adrenocorticotropic

hormone secretiond.Less than normal aldosterone

secretione.Increased sodium excretion in the

urinef. Patchy hyperpigmentation of skin

7. Which of the following hormones travels in the blood bound to carrier proteins?

a.Oxytocinb.T4c.Aldosteroned.Leutinizing hormonee.Estradiolf. TSHg.EPI

8. Gonadotropin releasing hormone is synthesized in and released from the:

a.Anterior pituitaryb.Posterior pituitaryc.Adrenal medullad.hypothalamus

9. A 40 year old woman develops an adenoma in the adenohypophysis which secretes excessive amounts of Growth Hormone. Which of the following are to be expected:

a.She grows abnormally tallb.Plasma levels of IGF-1 will be high.c.Plasma levels of GHRH will be highd.Bones of the face, hands, and feet will

gradually atrophy (get smaller.)

10. Which of the following is released from the adrenal medulla?

a.Norepinephrineb.Testosteronec.Adrenocorticotropic hormoned.Cortisole.Epinepherine

11. Which of the following reaches its target cells by first entering capillaries in the median eminence?

a.Norepinephrineb.TSHc.Adrenocorticotropic hormoned.Cortisole.Dopaminef. Somatostating.Corticotropin Releasing Hormone.

12. Which ONE of the following hormones is eliminated most rapidly from the bloodstream?

a.Norepinephrineb.TSHc.Cortisold.T3e.Estradiolf. Aldosterone

13. What is the source of renin?a.The adrenal cortexb.The adrenal medullac.The anterior pituitaryd.Cell of the macula densae.Juxtaglomerular cells in the kidneyf. The liver

14. Drugs that block the activity of angiotensin converting enzyme are used to treat people with high blood pressure. Blocking ACE will

a.Prevent the secretion of reninb.Prevent the formation of Angiotensin Ic.Prevent the formation of Angiotensin IId.Cause a person to become very thirsty.

15. Angiotensin II has the following actions:

a.Suppresses thirstb.Contracts smooth muscles of blood vessels

thereby raising blood pressurec.Stimulates the secretion of aldosteroned.Stimulates the secretion of cortisol

16. In patients with Hashimoto’s disease the thyroid gland is destroyed by cells of the immune system. Which of the following would be elevated in the blood of a person with untreated Hashimoto’s disease ?

a.T3b.T4c.TSHd.TRH

17. In patients with untreated Hashimoto’s disease which of the following would be expected?

a.high blood pressureb.tachycardia (higher than normal heart rate)c.diarrhead.hypothermia

18. Which of the following hormones cannot be effectively administered in tablets taken orally?

a.T3b.TSHc.Vasopressind.Cortisole.Growth hormone

19. Which of the following hormones have receptors on the cell surface of their target cells?

a.T3b.TSHc.TRHd.EPIe.Cortisolf. Aldosteroneg.Insulinh.Prolactin

20. Suppose a patient presents with high levels of TSH and high levels of T3 and T4. The diagnosis is most likely

a.Primary hyposecretionb.Secondary hyposecretionc.Primary hypersecretiond.Secondary hypersecretion.

Answers to Practice Quiz• 1 ab• 2 abd• 3 abd• 4 adefg• 5 be• 6 bdf• 7 bce• 8 d• 9 b• 10 ae

• 11 efg• 12 a• 13 e• 14 c• 15 bc• 16 cd• 17 d• 18 bce• 19 bcdgh• 20 d