Tag: changes in body during adolescence

Questions Related to changes in body during adolescence

Which is the hormone that brings about changes in girls during puberty? 

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Estrogen

  2. Progesterone

  3. Testosterone

  4. Thyroxine

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Correct Option: A
Explanation:

Estrogen is essential for development of secondary sex organs and external female sex characters like breasts, high pitch voice at puberty. The main function is the tissue growth and cell proliferation in specific areas of body. It promotes the development and maintenance of female reproductive structures. It assists in the control of fluid and electrolyte balance within the body, ensuring that our skin retains moisture. It prepares the follicle for the release of an egg. It controls the changes in our cervical mucus. It prepares our internal environment for fertility making it more sperm friendly.

Ovary produce which hormone?

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Estrogen

  2. hCG

  3. HPL

  4. Relaxin

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Correct Option: A

Which one of the following conditions correctly describes the manner of determining the sex in the given example

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Homozygous sex chromosomes (xx) produce male in Drosophila

  2. Homozygous sex chromosomes (ZZ) determine female sex in birds

  3. XO type of sex chromosomes determines female sex in grasshopper

  4. XO condition in human as found in turner syndrome, determines females sex

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Correct Option: A

Corpus luteum releases?

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Estrogen

  2. Progesterone

  3. Estrogen and progesterone

  4. Androgen

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Correct Option: A

During proliferative phase, mitosis in endometrium is stimulated by ______________.

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. oestrogen

  2. FSH

  3. progesterone

  4. LH

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Correct Option: A
Explanation:
During the proliferative phase, the secretion of estrogen through the growing ovarian follicle is responsible for the proliferation of the endometrium by intensive mitosis in the glandular epithelium and in the stroma.
So, the correct option is 'Estrogen'.

Formation of corpus luteum is induced by

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. LH

  2. Estrogen

  3. FSH

  4. Progesterone

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Correct Option: A

The hormone administered by doctors to a pregnant woman to help in childbirth during the time of natural delivery is ________

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Oestrogen

  2. Progesterone

  3. Insulin

  4. Relaxin

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Correct Option: A

Female sex hormones are 

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Progesterone

  2. Estrogen

  3. Testosterone

  4. Both A and B

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Correct Option: D
Explanation:

There are two major female sex hormones as estrogen and progesterone. Both of these are steroid hormones and are produced by the ovaries.
Therefore, the correct answer is option D.

The hormone responsible for changes in female at puberty is

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Estrogen and progesterone

  2. Progesterone

  3. Testosterone

  4. Oxytocin

Show answer
Correct Option: A
Explanation:

Estrogens are primary female sex hormones that serve in maturation and maintenance of sex organs, development of female secondary sexual characters and initiation of menstrual cycle. Likewise, progesterone prepares the body for pregnancy and maintain the uterus if pregnancy occurs. Along with estrogens, progesterone helps initiate menstrual cycle in girls entering the puberty. Both enzymes work synergistically. 

Testosterone is male sex hormone which is responsible for development of male secondary sexual characters in males. 
Oxytocin (OT) stimulates uterine muscle contraction during childbirth and initiates release of milk by mammary gland.
Therefore, the correct answer is option A.

Estrogens are secreted by

biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

  1. Follicle cells

  2. Ovary

  3. Germinal epithelium

  4. Stroma

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Correct Option: B
Explanation:

Estrogen is the female sex hormone. It is mainly secreted by the granulosa cells of the ovarian follicles (in ovary) under the influence of FSH. These hormones are also released by the corpus luteum (after the egg has been released from the follicle) and from the placenta. It is responsible for maintaining the secondary sexual characteristics in female. In males, it helps in the sperm maturation. It also thickens the uterine lining during the menstrual cycle for pregnancy. So, the correct option is A.