I: | are actually synthesised by the hypothalamus. |
II: | are transported through a portal vein to neurohypophysis. |
I: | in childhood leads to gigantism. |
II: | in adults especially in middle age can result in severe disfigurement (especially of the face) called Acromegaly. |
I: | In males, LH stimulates the synthesis and secretion of hormones called androgens from testis. |
II: | In males, FSH and androgens regulate spermatogenesis. |
III: | In females, LH induces ovulation of fully mature follicles (graafian follicles) and maintains the corpus luteum, formed from the remnants of the graafian follicles after ovulation. |
IV: | FSH stimulates growth and development of the ovarian follicles in females. |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
I: | in females, stimulates a vigorous contraction of uterus at the time of child birth. |
II: | is a steroidal hormone. |
III: | causes milk ejection from the mammary gland. |
Assertion (A): | An impairment affecting synthesis or release of ADH results in a diminished ability of the kidney to conserve water leading to water loss and dehydration. |
Reason (R): | Vasopressin acts mainly at the kidney and stimulates resorption of water and electrolytes by the distal tubules. |
1. | (A) is True; (R) is False |
2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
3. | Both (A) and (R) are True and (R) correctly explains (A) |
4. | (A) is False; (R) is True |
I: | plays a very important role in the regulation of a 24-hour (diurnal) rhythm of our body. |
II: | influences metabolism, pigmentation, the menstrual cycle as well as our defense capability. |
I: | is composed of two lobes interconnected with a thin flap of connective tissue called isthmus. |
II: | is composed of follicles and stromal tissues. |
III: | is located in the mediastinum, ventral to aorta. |
Statement I: | Thyroid follicular cells synthesise three hormones: thyroxine, triiodothyronine and thyrocalcitonin. |
Statement II: | Iodine is essential for the normal rate of hormone synthesis in the thyroid. |