Question

To yield more milk, the cow is injected with
(a) Sorbitol
(b) Prolactin
(c) Gonadotrophs
(d) Stilbestrol

Answer 1

The hormone is secreted by the adenohypophysis which results in the growth of breast and the production of milk during the pregnancy. This hormone is associated with the period of lactation in women.

Complete answer
The hormone prolactin is secreted by the anterior pituitary. The hormone prolactin is named initially after its role in promoting milk production or lactation in mammals, due to which it is also called the ‘milk hormone’. Lactotroph cells of the anterior pituitary gland secrete prolactin, where it is stored and discharged when it is needed. Prolactin is a protein that is also known as luteotropic. This hormone is injected into the cows to increase the production of milk in them.
-Prolactin is regulated by dopamine which is a hormone secreted by the hypothalamus. Dopamine inhibits prolactin production, which means the higher the concentration of dopamine, the lower the concentration of prolactin.
-Sorbitol is sugar or sweetener found in the fruits and other laxative plants. It is a sugar alcohol and is also known as glucitol. The reduction of glucose may result in the formation of the sorbitol.
-Gonadotrophs are a glycoprotein polypeptide hormone of the anterior pituitary gland. They are responsible for the secretion of FSH that regulates the growth, development, pubertal maturation, and reproductive processes of the body.
-Stilbestrol is an estrogen medication that is made artificially with synthetic media and is used as a contraceptive and in the case of livestock, it functions as a growth-promoting hormone.

So, the correct answer is ‘Prolactin’.

Note:
Prolactin is done in the assessment of fertility concerns or amenorrhea. The level of prolactin increases throughout the pregnancy and remains high and just after childbirth. Prolactin is present in small amounts in men and non-pregnant women.