Tag: what happens if an egg is not fertilized?

Questions Related to what happens if an egg is not fertilized?

A human female reaches menopause around the age of

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

  1. 50 years

  2. 17 years

  3. 70 years

  4. 25 years.

Show answer
Correct Option: A
Explanation:

Menopause marks the end of a woman's fertility and the cease of the menstrual cycle. The ovaries stop producing hormones and in humans, the menstrual cycle ceases at around 50 years of age. 

So, the correct answer is '50 years'. 

The phase of menstrual cycle in humans that last for 7-8 days, is

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

  1. Follicular phase

  2. Ovulation phase

  3. Luteal phase

  4. Menstruation

Show answer
Correct Option: A

During proliferative phase uterine wall undergoes certain changes, these are _________________.

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

  1. Myometrium wall is sloughed off

  2. Endometrium wall is sloughed off

  3. Blood vessels in endometrium become long and coiled

  4. Proliferation of myometrial epithelial lining

Show answer
Correct Option: C
Explanation:

During the proliferative phase, the endometrium of the uterus becomes thicker as blood vessels become long and coiled.

So, the correct answer is C.

Which of the following statements concerning menopause is correct?

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

  1. Menopause occurs because all of the female's follicles become hormone-producing corpus luteum at once

  2. Menopausal symptoms are a result of decrease in the production of FSH and LH

  3. The onset of menopause is primarily due to follicle atresia

  4. All of these

Show answer
Correct Option: C
Explanation:

Follicular atresia means degeneration of follicles. Thus, if all follicles get degenerated at the age of 45-50 years, there will be no ovulation and hence no menstruation which leads to menopause.

Cessation of menstrual cycle in a woman is called ___________.

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

  1. Lactation

  2. Ovulation

  3. Menopause

  4. Parturition

Show answer
Correct Option: C
Explanation:

Menopause is a phase occurring between the age of 45 to 55 years In a woman's life when ovulation and menstruation stop.

So, The correct answer is C.

A woman who is not having a menstrual cycle, which one of the following is the most likely root cause of this?

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

  1. Maintenance of the hypertrophical endometrial lining

  2. Maintenance of high concentration of sex-hormones in the blood stream

  3. Retention of well-developed corpus luteum

  4. Fertilisation of the ovum

Show answer
Correct Option: D

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'