Question

Which is/are responsible to stimulate Leydig cells and corpus luteum to secrete male and female hormones respectively and also called ICSH?
(a) LH
(b) LTH and FSH
(c) ACTH
(d) Corticoids and TSH

Answer 1

The hormone responsible for stimulating Leydig cells and corpus luteum is also called lutropin or leutrophin. The excess of secretion of this hormone leads to polycystic ovaries in females and less sperm production in males.

Complete answer:
The luteinizing hormone is responsible for ovulation in females and stimulates Leydig cells and corpus luteum to secrete male and female hormones. An endocrine gland is called a pituitary gland. It has two anterior and posterior lobes. Hormones such as Adrenocorticotropic hormone (ADH) , luteinizing hormone, follicle- stimulating hormone, thyroid- stimulating hormone, growth hormone, prolactin, are secreted by the anterior pituitary. In the testis, LH activates Leydig cells to produce testosterone. LH is known as Interstitial Cell Stimulating Hormones (ICHS) . It also causes ovulation by acting on the corpus luteum.

Additional Information:
- Ovulation is the name of the mechanism that typically occurs when hormonal changes cause an ovary to release an egg once in a menstrual cycle. Ovulation normally occurs 12 to 16 days before the start of our next cycle. The body releases increasing amounts of a hormone called estrogen when ovulation is reached, which allows the lining of the uterus to thicken. These high levels of estrogen cause another hormone called the LH to increase. The LH surge stimulates the release of the mature eggs from the ovary and this process is known as ovulation. Ovulation usually occurs 24 to 36 hours after the LH surge, which is why the LH surge is a strong indicator of peak fertility. The egg can only be fertilized for up to 24 hours after ovulation. If it isn't fertilized the lining of the womb is shed (the egg is lost with it) and the menstrual cycle begins. This marks the beginning of the next period of menstruation.
- In men, LH induces testosterone, which is necessary for sperm production, to be released by the testicles. LH levels do not typically change too much in men. In males, it helps to signal the testes for testosterone production.
So, the correct answer is, ‘(a) LH’.

Note: Gonadal function failure (hypogonadism) may result in decreased secretion of LH. In males, this disorder is commonly manifested as a failure in the development of normal sperm numbers. Amenorrhea is commonly found in females. Relatively elevated LH is also seen in patients with polycystic ovary syndrome during the reproductive years.