The secretion of most hormones is controlled by a positive feedback system. Aldo
ID: 87195 • Letter: T
Question
The secretion of most hormones is controlled by a positive feedback system. Aldosterone is synthesized from cholesterol Hormone receptors are always located on the cell membrane. A hormone carries out a single a single specific function. Hormones regulate certain activities of the immune system. Molecules called G-proteins link hormone receptors on the outer surface of the membrane to adenyllate cyclase molecules in the inner membrane. Steroid hormones are usually released in large quantities into the blood Radioimmunoassay utilize antibodies that specifically bind (combine) with a single hormone. Steroid hormones are stored and then released in large quantities into the blood. Removal of one pair of endocrine glands often results in the enlargement of the gland.Explanation / Answer
31. False.
Most of the endocrine glands are controlled by negative feedback mechanisms eg. parathyroid hormone which regulates blood Ca level.
32. True.
Aldosterone is synthesized from cholesterol
33. False.
Peptide hormone receptors are located on the plasma membrane while steroid hormone receptors are located in the cytosol, nucleus and on the plasma membrane.
34. True.
A hormone binds to a specific receptor to give the specific response.
35. True.
Hormones regulate certain activities of the immune system. Both pituitary and hormones from hypothalamus interfere with the lymphocyte proliferation and function.
36. True.
Molecules called G proteins link hormone receptors on the outer surface of the membrane to the adenylate cyclase molecules in the inner membrane.
37. Steroid hormones are released into the blood but in a proper amount.
38. True. RIA is utilized to measure the concentration of antigens (level of hormones) by the use of antibodies and it is highly sensitive
39. False. Steroid hormones are released in particular amount into the blood but not stored anywhere.
40. False.
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