Tag: biology

Questions Related to biology

Repair of endometrium is undertaken by _________.

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. LH

  2. FSH

  3. Estrogen

  4. Prolactin

Show answer
Correct Option: C
Explanation:

Estrogen secreted from ovarian follicles under the influence of FSH causes the proliferation of the endometrium of the uterine wall.

So, The correct answer is C.

Though the total number of follicles in the ovaries of a normal young woman is about 4,00,00. The duration between menarche and menopause is limited. This is attributed to the

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. Follicular atresia

  2. Liquor folliculi

  3. Follicular proliferation

  4. Follicular plasticity

Show answer
Correct Option: A
Explanation:

Follicular atresia is the breakdown of the ovarian follicles, which consist of an oocyte surrounded by granulosa cells and internal and external theca cells. This is the reason, the female born with more than 4,00,000 eggs have a limited period between menarche and menopause.

So, the correct option is 'Follicular atresia'

In human females, menstrual cycle ceases around $50$ years of age. It is termed as

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. Menopause

  2. Menarche

  3. Diapause

  4. None of the above

Show answer
Correct Option: A
Explanation:

In human females endometrium (the innermost layer of the uterus) undergoes cyclical changes every month which is known as menstruation. It starts at the age of puberty, this beginning is called menarche. Human females can only reproduce till 45 to 50 years of age. When the menstruation stops it is called menopause.

So, the correct option is 'menopause'.

A $55$ years old female was analyzed for her hormonal status. Some hormones are increased in blood and excreted in urine. These hormones are

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. Estrogen, progesterone and $FSH$

  2. Progesterone and $LH$

  3. $LH$ and $FSH$

  4. Estrogen and $FSH$

Show answer
Correct Option: C
Explanation:

In females, the post-reproductive phase of menopause begins from the age of 45 years approximately. In this phase, the primary follicles are not available that can be developed under the effect of FSH. When follicles do not develop, ovulation cannot occur under the effect of LH. There is no corpus luteum formed, so there will be no progesterone. As there is no progesterone, the endometrium stops building up. Due to this, there are no menses occurring. Since FSH and LH are released by the pituitary gland, they would be un-used and excreted in urine.

Hence, the correct answer is 'LH and FSH'

A $25$ year old female goes to a doctor. She asks the doctor that after $4$ days there is the due date of her menses and she wants to postpone bleeding for some days as she will be engaged in some official work during those days. Which hormone will the doctor advise her to take?

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. FSH

  2. Oestrogen

  3. Progesterone only

  4. LH only

Show answer
Correct Option: C
Explanation:

Progesterone is a hormone which is secreted by the corpus luteum. It is responsible for the maintenance of the endometrium of the uterus. As long as the progesterone is secreted by the corpus luteum, the menses does not begin. When the corpus luteum degenerates in the absence of a fertilization event, the progesterone secretion stops and the endometrium starts to break down and menses begin. So, in order to delay the menses, intake of progesterone will be advised because it will prevent the break down of endometrium and menses will not occur.

A. FSH is responsible for the follicular growth in ovarian cells. It is secreted by the pituitary gland.
B. Oestrogen is responsible for synergistic effect with FSH during the menstrual cycle.
C. Progesterone is the endometrium maintaining hormone, so it is also called the pregnancy hormone.
D. LH is secreted by the pituitary gland and it is responsible for the ovulation.
Hence, the correct answer is 'Progesterone only'

State whether the following statements are true or false. If false, write changing the incorrect word / words only.
Menarche is the permanent stoppage of menstruation in females

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The release of the first menstrual flow or period is called menarche. It marks the beginning of a female's reproductive life and is one of the most obvious signals of the onset of puberty. Menarche usually occurs between the age of 11-14 years. While Menopause is the condition in which menstrual cycle stops naturally in women. 


So the answer is false and the statement should be"menopause is the permanent stoppage of menstruation in females". 

The time for optimum chances of conception in a woman is starting from the day of menstruation.

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. 1st day

  2. 4th day

  3. 14th day

  4. 26th day

Show answer
Correct Option: C
Explanation:

This is usually about 14 days after the first day of your last period if your cycle is around 28 days long. An egg lives for about 12-24 hours after being released. For pregnancy to happen, the egg must be fertilized by sperm within this time. Sperm can live for up to 7 days inside a woman's body.


So, the correct option is 'Option C, 14th day'.

Which of the following statement is incorrect?

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. First menstruation at puberty is menarche

  2. Release of ovum from ovary is oogenesis

  3. Menstruation is repeated at an average interval of about 28-29 days

  4. Lack of menstruation may be indicative of pregnancy

Show answer
Correct Option: A

Which one of the following is the correct matching of the events occurring during menstrual cycle?

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. Proliferative phase: Rapid regeneration of myometrium and maturation of Graafian follicle

  2. Development of: Secretory phase corpus luteum and increased secretion of progesterone

  3. Menstruation: Breakdown of myometrium and ovum not fertilised

  4. Ovulation: LH and FSH attain peak level and sharp fall in the secretion of progesterone

Show answer
Correct Option: A

Menstruation occurs in order to

biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

  1. To shed blood

  2. To shed enlarged endometrium layer which is not needed

  3. To shed ovum

  4. To help entry of sperm

Show answer
Correct Option: B
Explanation:

Menstruation is a woman's monthly bleeding. It occurs so as to shed the lining of the uterus or womb.
In menstrual cycle, the uterus gets prepared for implantation and the endometrium builds up, After ovulation, if the egg released does not gets implanted in the uterus, it leads to shedding off this endometrium and its lining and this is called as menstruation,
Thus, the correct answer is option B.