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Reaching the Age of Adolescence - 2

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In the absence of fertilisation, the released egg and the thickened lining of the uterus along with its blood vessels are shed off. This causes bleeding in women, which is called menstruation. The first menstrual flow is termed as

  1. menopause

  2. ovulation

  3. menarche

  4. implantation


Correct Option: C
Explanation:

In the absence of fertilisation, the released egg and the thickened lining of the uterus along with its blood vessels are shed off. This causes bleeding in women which is called menstruation.The first menstrual flow begins at puberty and is termed as menarche.

Which of the following is a correct statement?

  1. A girl becomes pregnant if she looks at boys during menstruation.

  2. A mother is responsible for the sex of her child.

  3. A father is responsible for the sex of his child.

  4. The legal age for marriage is 18 years for girls and boys.


Correct Option: C
Explanation:

A father is responsible for the sex of his child because he is heterogametic and can produce two types of gametes; one with a X chromosome and the other with a Y chromosome.

Ram's uncle was suffering from ‘diabetes’ because his pancreas was not producing a hormone in a sufficient quantity. Identify the hormone.

  1. Glucagon

  2. Vasopressin

  3. Thyroxine

  4. Insulin


Correct Option: D
Explanation:

Deficiency of insulin causes diabetes.

An unfertilised egg always has

  1. X chromosome

  2. Y chromosome

  3. a pair of X and Y chromosomes

  4. no chromosome


Correct Option: A
Explanation:

A female egg has X chromosome.

Why many adolescents get acne and pimples at the time of puberty?

  1. Because of irregular sex hormones

  2. Because of development of secondary sex organs

  3. Because of reproductive maturity

  4. Because of increased activity of sebaceous and sweat glands


Correct Option: D
Explanation:

The reason why many adolescents get acne and pimples at the time of puberty is because of increased activity of sebaceous or oil and sweat glands.

Which of the following processes in the body is not controlled by hormones?

  1. Blood circulation

  2. Height

  3. Growth

  4. Changes in body shape


Correct Option: A
Explanation:

The circulation of blood refers to its continual flow from the heart. It is not controlled by hormones.

Which of the following is strictly not to be done by an adolescent?

  1. Taking drugs

  2. Having a balanced diet

  3. Proper exercise

  4. Personal hygiene


Correct Option: A
Explanation:

Taking drugs is an addictive bad habit, which has plenty of negative effects.

Which of the following changes does not occur in a female adolescent?

  1. High pitched voice

  2. Menstrual cycle begins

  3. Adam’s apple protrudes from the neck region

  4. Increase in height


Correct Option: C
Explanation:

In a female adolescent, Adam’s apple does not protrude from the neck region. This change occurs in a male adolescent.

Why the presence of iodine is necessary in water in which tadpoles are growing?

  1. Iodine gives nourishment to tadpoles.

  2. Iodine keeps external environment suitable for the growth of tadpoles.

  3. Thyroxin production requires iodine which controls metamorphosis in frogs.

  4. Thyroxin secreted by iodine maintains the concentration of salts in water and helps in the development of tadpoles into frogs.


Correct Option: C
Explanation:

Iodine is necessary because production of Thyroxine hormone requires iodine which controls metamorphosis in frogs.

Which of the following events occur during puberty in a girl?

(i) Widening of chest (ii) Broadening of pelvis (iii) Broadening of shoulders (iv) Widening of spine bones

  1. (i) and (iii)

  2. (ii) and (iii)

  3. (iii) and (iv)

  4. (ii) and (iv)


Correct Option: D
Explanation:

In girls, broadening of pelvis and widening of spine bones take place. The other two changes take place in boys.

Which of the following is not true about teenage pregnancy?

  1. Health problems occur in a mother and her child

  2. Mental agony of adolescents

  3. Health improves due to pregnancy

  4. The girl is not ready for responsibilities of motherhood


Correct Option: C
Explanation:

Health does not improve due to teenage pregnancy.

Which of the following statements is not true about puberty?

  1. It makes individuals capable of reproduction.

  2. At puberty, height increases markedly.

  3. Boys start getting hairy line above their lips.

  4. It comes around the age of 20 years.


Correct Option: D
Explanation:

Puberty makes individuals capable of reproduction. It comes at the age of 11 to 13 years. It brings changes like increase in height and boys getting hairy line above their lips.

Which among the following statements correctly defines adolescence?

  1. The period during which an egg and a sperm fuse

  2. The period during which a body undergoes changes leading to reproductive maturity

  3. The birth time of an individual

  4. The period during which an individual loses his/her ability to reproduce due to old age


Correct Option: B
Explanation:

The period of life, when the body undergoes changes leading to reproductive maturity, is called adolescence.

Why does the voice of boys become hoarse during teenage?

  1. Because of enlargement of buccal cavity

  2. Because of secretion of glands

  3. Because of the overgrowth of larynx

  4. None of these


Correct Option: C
Explanation:

At puberty, the voice box or larynx begins to grow. Sometimes, the muscles of the voice box overgrow and the voice becomes hoarse.

Where do endocrine glands release their secretions?

  1. Near the target site

  2. Into the blood stream

  3. Into the ducts

  4. Inside the cytoplasm of the cell


Correct Option: B
Explanation:

Endocrine glands release their secretions directly into the blood stream.

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