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Reaching the Age of Adolescence (Class - VIII)

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Which of the following is the function of insulin hormone?

  1. It prepares the body to function at maximum efficiency.

  2. It controls the rate of body's metabolism.

  3. It controls the metabolism of sugar.

  4. It controls the growth of human body.

  5. None of these


Correct Option: C
Explanation:

This is the correct option. Insulin hormone controls the metabolism of sugar.

Acquired Immune Deficiency Syndrome is mainly an incurable sexually transmitted disease. Which of the following is/are the causative agent(s) of this disease?

  1. Fungi

  2. Bacteria

  3. Protozoa

  4. Virus

  5. Worms


Correct Option: D
Explanation:

Acquired Immune Deficiency Syndrome is caused by HIV virus.

A couple had a male child. Which of the following factors is responsible for a male child?

  1. Egg carries Y chromosomes.

  2. Sperm carries X chromosomes.

  3. Egg carries X chromosomes.

  4. Sperm carries Y chromosomes.

  5. None of the above


Correct Option: D
Explanation:

If a sperm carrying Y chromosome fertilises with an egg that carries X chromosome, then the zygote formed will have XY combination due to which the child born will be a male.

Indian food is a balanced food. Which of the following should not be a part of the adolescent balanced diet?

  1. Milk

  2. Noodles

  3. Pulses

  4. Rice

  5. Indian gooseberry


Correct Option: B
Explanation:

Noodles do not form a part of the adolescent balanced diet.

Which of the following glands does not secrete its product after receiving orders from the pituitary gland through its hormones?

  1. Adrenal gland

  2. Testis

  3. Thyroid gland

  4. Ovary

  5. Salivary gland


Correct Option: E
Explanation:

Salivary gland does not secrete its product after receiving orders from the pituitary gland through its hormones.

In a frog, metamorphosis is brought about by thyroxine hormone. The production of thyroxine hormone requires the presence of which of the following in water?

  1. Iron

  2. Calcium

  3. Sodium

  4. Potassium

  5. Iodine


Correct Option: E
Explanation:

This is the correct option. In a frog, metamorphosis is brought about by thyroxine hormone. The production of thyroxine hormone requires the presence of iodine in water.

Which of the following statements is/are false?

a. The aldosterone hormone maintains the correct salt balance in the blood. b. AIDS virus weakens the immunity of the body due to which the body is unable to fight disease-causing germs. c. AIDS virus cannot be transmitted to an infant from the infected mother through her milk.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: E
Explanation:

AIDS virus can be transmitted to an infant from the infected mother through her milk.

Endocrine glands are ductless glands that make and secrete hormones. Which of the following endocrine glands occur(s) in pairs?

a. Adrenal gland b. Pituitary gland c. Testis d. Ovary

  1. Only b

  2. Only b and c

  3. Only a, b and c

  4. Only a, c and d

  5. Only b, c and d


Correct Option: D
Explanation:

Adrenal gland, testis and ovary occur in pairs inside the human body.

Which of the following organs is/are not a part of female reproductive system?

  1. Ovaries

  2. Uterus

  3. Vagina

  4. Oviducts

  5. Seminal vesicles


Correct Option: E
Explanation:

Seminal vesicles are not a part of female reproductive system. They are present in males.

Male sex hormones, which are responsible for changes in adolescent males at puberty, are made by the testes. Which of the following hormones is responsible for these changes?

  1. Estrogen

  2. Testosterone

  3. Thyroxine

  4. Adrenaline

  5. Aldosterone


Correct Option: B
Explanation:

Testosterone hormone is responsible for changes in adolescent males at puberty.

Which of the following statements is/are false?

a. The reproductive phase of life in women lasts much longer than in men. b. Pancreas, testes and ovaries function as endocrine as well as exocrine glands. c. Hormones released by endocrine glands reach the concerned body part through blood and act on it.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: A
Explanation:

The reproductive phase of life in men lasts much longer than in women.

Different endocrine glands release different hormones. The faulty functioning of which of the following endocrine glands can make a person dwarf or giant?

  1. Testes

  2. Pancreas

  3. Ovaries

  4. Pituitary gland

  5. Thyroid gland


Correct Option: D
Explanation:

The faulty functioning of pituitary gland in releasing the growth hormone can make a person dwarf or giant.

Many young boys and girls get pimples and acne on the face during puberty. Pimples and acne are formed due to the increased activity of which of the following glands?

a. Sebaceous gland b. Adrenal gland c. Pancreas d. Thyroid gland

  1. Only a and b

  2. Only b and c

  3. Only a

  4. Only b and d

  5. Only a and d


Correct Option: C
Explanation:

Pimples and acne are formed due to the increased activity of sebaceous glands.

The secondary sexual characteristics in males and females start developing at the time of puberty and continue to develop through the period of adolescence. Which of the following secondary characteristics is not produced by estrogen?

  1. Development of breasts

  2. Broadening of hips

  3. Development of Adam's apple

  4. Development of high pitched or shrill voice

  5. None of the above


Correct Option: C
Explanation:

The development of Adam's apple is not produced by estrogen. It is a male secondary characteristic and is produced by testosterone.

Match the following. Hormones|Glands| |a. Growth hormone|1. Pancreas| |b. Insulin hormone|2. Adrenal gland| |c. Aldosterone hormone|3. Pituitary gland|

  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 1, c - 3

  5. a - 1, b - 2, c - 3


Correct Option: B
Explanation:

Growth hormone is secreted by pituitary gland. Insulin hormone is secreted by pancreas. Aldosterone hormone is secreted by adrenal gland.

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