Tag: the age of adolescence

Quizzes (9) Questions (142)

Questions Related to the age of adolescence

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

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

  1. oestrogen

  2. FSH

  3. progesterone

  4. LH
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice biology the age of adolescence changes in body during adolescence hormone during puberty role of hormones in reproduction

The hormone responsible for changes in female at puberty is

  1. Estrogen and progesterone

  2. Progesterone

  3. Testosterone

  4. Oxytocin
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Estrogens are secreted by

  1. Follicle cells

  2. Ovary

  3. Germinal epithelium

  4. Stroma
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Identify the mis-matched pair.

  1. Thyroid gland: Thyroxine

  2. Ovary: Estrogen

  3. Pancreas: Auxin

  4. Adrenal medulla: Adrenaline
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

a) Thyroxine is a thyroid hormone which targets all tissues and stimulates metabolic rate, growth, and development. 

b) Estrogen is the female sex hormone secreted by developing follicles in the ovary. It serves to stimulate the growth of the uterus and the vagina, is necessary for egg maturation as well as for the development of the secondary sex characteristics in females. 
c) The pancreas is a large organ present in the abdomen and serves as both endocrine and exocrine organ. The endocrine parts of the pancreas are islets of Langerhans that produce and secrete insulin and glucagon hormones. Auxin is a plant growth hormone. 
d) Adrenaline is an emergency hormone secreted by adrenal medulla under an emergency condition to prepare the body for flight or fight response. 

Thus, option C is the mismatched pair.