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Norepinephrine is released by sympathetic fibres i.e., rapidly secreted in response to stress of any kind and during emergency situations. It increases the heart beat, the strength of heart contraction and the rate of respiration.

1. Leydig cells or interstitial cells, which are present in the intertubular spaces produce a group of hormones called androgens mainly testosterone.
2. Cortisol and testosterone are steroid hormones which are lipid soluble and easily pass through the cell membrane of a target cell and bind to specific intracellular receptor.
3. Posterior pituitary releases vasopressin which stimulates reabsorption of water in the distal tubules in nephron.
4. Anterior pituitary secrets growth hormone. Ovary secrets oestrogen hormone. Alpha cells of islets of langerhans secrets glucagon.

Correct answer: Anterior pituitary secrets growth hormone. Ovary secrets oestrogen hormone. Alpha cells of islets of langerhans secrets glucagon.

Solution

The correct option is the one where each gland is paired with its known secretion: anterior pituitary with growth hormone, ovary with estrogen, and pancreatic alpha cells with glucagon. The other choices contain incorrect or less precise hormone-source descriptions.

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