1) What is the hormone that most closely complements the effects of PTH: a) Calcitonin b)...

1) What is the hormone that most closely complements the effects of PTH:

a) Calcitonin

b) Calcitriol

c) Cholecalciferol

d) Cortisol

2) What is the target organ of thyrotropin-releasing hormone:

a) posterior pituitary

b) thyroid gland

c) parathyroid gland

d) anterior pituitary

Solutions

Expert Solution

1...option A is correct

calcitonin: it accelerates the amount of calcium and phosphorus taken up by the bone. calcitonin works together with parathyroid hormone to regulate calcium levels .

calcitriol: it acts on parathyroid gland ,regulating calcium receptor levels and directly inhibiting trandescription of the gene encoding of parathyroid hormone. calcitriol is important secondary effects on PTH secretions....so this option is not related to the above question.

cholecalciferol: it is a vitamin D3..vitamin D is important for absorption of calcium from the stomach and functioning of calcium in the body. ..so this option is also not related to the above question.

cortisol: cortisol stimulation of parathyroid hormone it may increased concentration of parathyroid hormone in the serum of cortisol treatment in animals. this option is Also not related to the question.

2..option B is correct

thyroid gland: thyrotropin releasing hormone is directly act on thyroid stimulating hormone and prolactin from the anterior pituitary gland...thyroid stimulating hormone is acts on thyroid gland...so the answer is thyroid gland...

D ..the question is targeted organs so thyroid gland is organ...anterior pituitary lobe is part of endocrine system it is not a organ..

A..posterior pituitary is wrong option....

posterior pituitary gland includes kidney and uterine smooth muscle.

C...parathyroid gland....secretion of the hormone is parathyroidhormone.it is present backside of the thyroid gland.....this is Also wrong option...

Sydney Mullin answered 11 months ago

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