Question

Which of the following steroid sex hormone influences secondary sex organ?
A. Progesterone
B. Oestrogen
C. LH
D. LTH

Answer 1

Hint: Steroid hormones are a class of organic compounds having hormones with steroids in them. The three major glands that produce steroid hormones are the adrenal cortex, testes, and ovaries. The steroid hormones released by testes and ovaries are called steroid sex hormones as they influence sexual characters in boys and girls respectively. The genitals or the visible sex organs except testes and ovaries are the secondary sex organs.

Complete answer: The hormones are the chemical substances that are cellular messengers. They carry chemically synthesized information from secretory cells to target sites where they show their impact. The steroid hormones are a large class of steroids that acts as hormones. The three major glands that release steroid hormones are the adrenal cortex, testes, and ovaries.
-The testes and ovaries are the primary sex organs as they secrete substances and hormones that further influence secondary sex organs development. The secondary sex organs are generally the genitals that are visible by birth. The steroid hormones secreted by primary sex organs are called steroid sex hormones. The two major steroid sex hormones are estrogens in females and androgens in males. Others are mineralocorticoids, glucocorticoids, progestins, etc.
-Oestrogen is a female steroid sex hormone that is secreted by female gonads. It is responsible for the development of secondary sexual characters when a female attains puberty. The changes in the body like the development of breasts, occurrence of axial and pubic hair, and fat deposition in particular areas of the female body are results of Oestrogen secretion. It also maintains sexual organs and supports their maturation. Furthermore, the thickening of the endometrium wall during pregnancy and maintenance of the menstrual cycle are functions of Oestrogen.
-Progesterone is involved in the regulation of ovulation and menstrual cycle in females. LH or luteinizing hormone regulates the release of eggs from the ovary. LTH or prolactin is a protein hormone secreted by the pituitary gland that helps to initiate milk secretion by the mammary glands in females.
Therefore, the right answer is option B.

Note: Hormones need to be secreted at a balanced level in the body. Any imbalance can lead to disorders and diseases in the body. For example, the high levels of Oestrogen can lead to the irregular menstrual cycle, soreness of breasts, Hypertension, etc. This imbalance is caused majorly by alcohol abuse. Thus, such types of unhealthy activities should be avoided.