A) Oxytocin- posterior pituitary, growth and maintenance of mammary glands
B) Melatonin-pineal gland, regulates the normal rhythm of 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
Correct Answer: B
Solution :
| [B] Melatonin is a hormone present in animals, plants and microbes. In animals melatonin allowing the regulation of the carcadian rhythms. Oxytocin is a neurohypophysial hormone which stimulates the muscle contraction (smooth muscle) in the wall uterus during childbrith. Progesterone is a female hormone produced by the ovaries during the releasse of a mature egg from an overy during ovulation. ANF stimulatotes the secretion of Na and \[{{H}_{2}}O\] by the kidneys and helps in regulating blood pressure. |
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