Chemical Coordination and Integration — NEET UG practice

1. Recall the effect of excess growth hormone to match (A).

Since excess growth hormone after bone growth has stopped causes abnormal enlargement of bones, especially in the hands, feet and face, this condition is:

$$\text{Excess Growth Hormone} \rightarrow \text{Acromegaly (III)}$$

2. Recall the function of luteinizing hormone to match (B).

Given that a mid-cycle surge of LH triggers rupture of the Graafian follicle:

$$\text{Luteinizing Hormone} \rightarrow \text{Ovulation (IV)}$$

3. Recall the function of vasopressin to match (C).

Since vasopressin (ADH) acts on the kidney tubules:

$$\text{Vasopressin} \rightarrow \text{Reabsorption of water and electrolytes in kidney (I)}$$

4. Recall the function of oxytocin to match (D).

Therefore, oxytocin causes strong contraction of uterine smooth muscle during childbirth:

$$\text{Oxytocin} \rightarrow \text{Contraction of uterus during child birth (II)}$$

Hence, the matching is A-III, B-IV, C-I, D-II, so the answer is option C.

1. Recall the function of cortisol to match (A).

Since cortisol is released during stress and suppresses the immune response:

$$\text{Cortisol} \rightarrow \text{Anti-inflammatory reactions (II)}$$

2. Recall the function of aldosterone to match (B).

Given that aldosterone acts on the renal tubules to conserve sodium and water:

$$\text{Aldosterone} \rightarrow \text{Reabsorption of } \mathrm{Na}^{+} \text{ and water from renal tubule (III)}$$

3. Recall the function of cholecystokinin to match (C).

Therefore, CCK acts on both the pancreas and gall bladder:

$$\text{Cholecystokinin (CCK)} \rightarrow \text{Stimulates pancreatic enzymes and bile juice secretion (IV)}$$

4. Recall the function of progesterone to match (D).

Since progesterone acts on the mammary glands during pregnancy:

$$\text{Progesterone} \rightarrow \text{Formation of alveoli in mammary glands (I)}$$

Hence, the matching is A-II, B-III, C-IV, D-I, so the answer is option C.

1. Recall the anatomical division of the pituitary gland to check statement (a).

Given that the pituitary gland is divided into two main parts:

$$\text{Pituitary gland} = \text{Adenohypophysis} + \text{Neurohypophysis}$$

Hence, statement (a) is correct.

2. Recall which hormones the adenohypophysis (anterior pituitary) secretes to check statements (b) and (c).

Since the anterior pituitary secretes:

$$\text{GH, TSH, ACTH, FSH, LH, Prolactin, MSH}$$

Therefore, statement (b) "It secretes follicle stimulating hormone" is correct, and statement (c) "It secretes melanocyte stimulating hormone" is also correct.

3. Check statement (d) against the same list of hormones.

Since prolactin is present in the list of hormones secreted by the adenohypophysis, statement (d) "It does not secrete prolactin" is incorrect.

Hence, the correct statements are (a), (b) and (c) only, so the answer is option C.