1. | Thyroxine | 2. | Thymosin |
3. | Cortisol | 4. | Aldosterone |
1. | acts mainly at the renal tubules and stimulates the excretion of Na+ and water and reabsorption of K+ and phosphate ions. |
2. | acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions. |
3. | acts mainly at the collecting duct and stimulates the excretion of Na+ and water and reabsorption of K+ and phosphate ions. |
4. | acts mainly at the collecting duct and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions. |
1. | It is a composite gland which acts as both exocrine and endocrine gland. |
2. | The endocrine pancreas consists of ‘Islets of Langerhans’. |
3. | There are about 1 to 2 million Islets of Langerhans in a normal human pancreas representing 90 percent of the pancreatic tissue. |
4. | It is an organ of the digestive system and endocrine system of vertebrates. |
A: | The α-cells secrete a hypoglycaemic hormone called glucagon. |
B: | The β-cells secrete a hyperglycaemic hormone called insulin. |
Assertion (A): | Diabetes mellitus is associated with loss of glucose through urine and formation of harmful compounds known as ketone bodies. |
Reason (R): | Insulin stimulates conversion of glucose to glycogen (glycogenesis) in the target cells. |
1. | (A) is True but (R) is False. |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | (A) is False but (R) is True. |
I: | regulate the development, maturation and functions of the male accessory sex organs. |
II: | stimulate muscular growth, growth of facial and axillary hair, aggressiveness, low pitch of voice etc. |
III: | play a major stimulatory role in the process of spermatogenesis (formation of spermatozoa). |
IV: | act on the central neural system and influence the male sexual behaviour (libido). |
V: | produce anabolic (synthetic) effects on protein and carbohydrate metabolism. |
Statement I: | The estrogen is synthesised and secreted mainly by the growing ovarian follicles. |
Statement II: | After ovulation, the ruptured follicle is converted to a structure called corpus luteum, which secretes mainly progesterone. |
Statement I: | Estrogens stimulate growth and activities of female secondary sex organs, development of growing ovarian follicles, and appearance of female secondary sex characters. |
Statement II: | Progesterone supports pregnancy. |
I: | Gastrin acts on the gastric glands and inhibits the secretion of hydrochloric acid and pepsinogen. |
II: | Secretin acts on the endocrine pancreas and inhibits secretion of water and bicarbonate ions. |
III: | CCK acts on both pancreas and gall bladder and inhibits the secretion of pancreatic enzymes and bile juice, respectively. |
IV: | GIP inhibits gastric secretion and motility. |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
I: | Binding of a hormone to its receptor leads to the formation of a hormone-receptor complex. |
II: | Each receptor is specific to one hormone only and hence receptors are specific. |
III: | Hormone-Receptor complex formation leads to certain biochemical changes in the target tissue. |