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Human Reproduction

Question
CBSEENBI12047410
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Which one of the following hormones is responsible for uterine contraction during parturition?

  • Relaxin

  • Vasopressin

  • Oxytocin

  • Prolactin

Solution

C.

Oxytocin

Oxytocin is a neurohypophysial hormone. It stimulates vigorous contraction of uterus at the time of child birth and milk ejection from the mammary gland.

Relaxin is a hormone produced by the ovary and the placenta. It causes the pelvic ligaments and cervix to relax during pregnancy and delivery of the baby.

Vasopressin mainly acts on the kidney and stimulates resorption of water and electrolytes by the distal tubules and thereby reduces loss of water through urine. It is also called as Anti-Diuretic Hormone (ADH).

Prolactin is produced by the pars distalis region of pituitary (anterior pituitary). It regulates the growth of the mammary glands and formation of milk in them.

Some More Questions From Human Reproduction Chapter

The process of differentiation of spermatid into a spermatozoa is known as :

Primary spermatocyte produces 4 spermatozoa, but primary oocyte produces :

Ovulation takes place :

Which of the following shows hermaphroditism and self fertilization ?

The chromosone in primary spermatocyte are :

The male reproductive system is located in the body, in the :

Sertoli cells provide :

The middle piece of human sperm contains :

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

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