A)
Source gland Hormone Function Posterior pituitary Vasopressin Stimulates re sorption of water in the distal tubules in the nephron
B)
Corpus Iuteum Oestrogen Supports pregneacy
C)
Thyroid Thyroxine Regulates blood calcium level
D)
Anterior pituitary Oxytocin Contraction of uterus muscles during child birth
Correct Answer: A
Solution :
| [A] The pituitary gland is located in a bony cavity called sella tursica and is attached' to hypothalamus by a stalk. It, is divided anatomically into an adenohypophysis and a neurohypophysis. The latter is also called pars nervosa or posterior pituitary. It stores and releases two hormone called, oxytpcin and vasopressin, which are actually synthesized by the hypothalamus and are transported axohally to neurohypophysis. Vasopressin acts mainly at the kidney and stimulates resorption of water and electrolytes by the distal tubules in the nephron and thereby reduces loss of water through urine (diuresis). Hence, it is also called as anti-diuretic hormone (ADH). |
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