Question

Following are the sources and functions of hormones. Identify the correct match.

• A. Oxytocin-Posterior pituitary; growth and maintenance of mammary glands.
• B. Melatonin-Pineal gland; regulates the normal rhythm of the sleepwake cycle.
• C. Progesterone-corpus-luteum; stimulation of growth and activities of female secondary sex organs.
• D. Atrial natriuretic factor-ventricular wall; increases the blood pressure.

Answer 1

The correct option is B Melatonin-Pineal gland; regulates the normal rhythm of the sleepwake cycle.

Melatonin, produced by the pineal gland, plays an important role in regulating the normal rhythm of the sleepwake cycle.
Oxytocin, produced by the posterior lobe or neurohypophysis of the pituitary gland, stimulates secretion of milk from mammary glands and causes contractions of the uterus at the time of childbirth.
Progesterone, produced by corpus-luteum in the ovaries, stimulates uterus for pregnancy, implantation and formation of the placenta, and also stimulate the mammary glands.
Atrial natriuretic factor, produced by the heart cells, decreases the blood pressure by dilation of the blood vessels.