Reaching the Age of Adolescence Part 4: MCQs (Q76–Q100)
🧑🤝🧑 Reaching the Age of Adolescence – MCQs for Class 8 Science
Part 4: Q76–Q100
Q76. Which hormone is secreted in larger amounts during stress?
A) Insulin
B) Adrenaline
C) Thyroxine
D) Estrogen
✅ Correct Answer: B) Adrenaline
Explanation:
- A, C, D – Not stress-related.
- B) ✔ Adrenaline is the “emergency hormone” released during stress.
Q77. Which vitamin is essential for healthy bones during adolescence?
A) Vitamin A
B) Vitamin B
C) Vitamin D
D) Vitamin K
✅ Correct Answer: C) Vitamin D
Explanation:
- A, B, D – Other roles.
- C) ✔ Vitamin D helps calcium absorption for bone strength.
Q78. Which of these is a communicable disease affecting adolescents?
A) Goitre
B) AIDS
C) Diabetes
D) Obesity
✅ Correct Answer: B) AIDS
Explanation:
- A, C, D – Non-communicable.
- B) ✔ AIDS spreads through HIV infection.
Q79. Which organ produces insulin?
A) Liver
B) Pancreas
C) Pituitary
D) Thyroid
✅ Correct Answer: B) Pancreas
Explanation:
- A, C, D – Other glands.
- B) ✔ Pancreas secretes insulin to control sugar levels.
Q80. Which hormone regulates metabolism in the body?
A) Insulin
B) Thyroxine
C) Testosterone
D) Estrogen
✅ Correct Answer: B) Thyroxine
Explanation:
- A, C, D – Other roles.
- B) ✔ Thyroxine controls metabolic rate.
Q81. Which hormone maintains pregnancy in females?
A) Estrogen
B) Progesterone
C) Testosterone
D) Growth hormone
✅ Correct Answer: B) Progesterone
Explanation:
- A, C, D – Not pregnancy-related.
- B) ✔ Progesterone maintains uterus lining for pregnancy.
Q82. Which of these is a secondary sexual character in boys?
A) Menstruation
B) Broadening of shoulders
C) Development of breasts
D) Broadening of hips
✅ Correct Answer: B) Broadening of shoulders
Explanation:
- A, C, D – Female traits.
- B) ✔ Broad shoulders are male puberty changes.
Q83. Which organ controls all endocrine glands?
A) Thyroid
B) Adrenal
C) Pituitary
D) Pancreas
✅ Correct Answer: C) Pituitary
Explanation:
- A, B, D – Controlled by pituitary.
- C) ✔ Pituitary = master gland.
Q84. Which mineral deficiency causes goitre?
A) Calcium
B) Iron
C) Iodine
D) Potassium
✅ Correct Answer: C) Iodine
Explanation:
- A, B, D – Cause other diseases.
- C) ✔ Iodine deficiency → goitre.
Q85. Which hormone regulates the female menstrual cycle?
A) Insulin
B) Progesterone
C) Adrenaline
D) Thyroxine
✅ Correct Answer: B) Progesterone
Explanation:
- A, C, D – Not related to menstruation.
- B) ✔ Progesterone regulates cycles.
Q86. Which vitamin deficiency causes rickets in adolescents?
A) Vitamin A
B) Vitamin D
C) Vitamin C
D) Vitamin K
✅ Correct Answer: B) Vitamin D
Explanation:
- A, C, D – Other deficiencies.
- B) ✔ Vitamin D deficiency weakens bones → rickets.
Q87. What does HIV attack in the human body?
A) Brain cells
B) White blood cells
C) Red blood cells
D) Bone marrow
✅ Correct Answer: B) White blood cells
Explanation:
- A, C, D – Not directly affected.
- B) ✔ HIV weakens immunity by destroying WBCs.
Q88. Which hormone increases during puberty in boys?
A) Estrogen
B) Testosterone
C) Progesterone
D) Thyroxine
✅ Correct Answer: B) Testosterone
Explanation:
- A, C – Female hormones.
- D – Metabolic regulator.
- B) ✔ Testosterone triggers male puberty changes.
Q89. Which organ secretes estrogen?
A) Testes
B) Ovaries
C) Pituitary
D) Pancreas
✅ Correct Answer: B) Ovaries
Explanation:
- A) Male organ.
- B) ✔ Ovaries → estrogen for female puberty.
- C, D – Other functions.
Q90. Which hormone helps in increasing height during adolescence?
A) Growth hormone
B) Adrenaline
C) Progesterone
D) Insulin
✅ Correct Answer: A) Growth hormone
Explanation:
- A) ✔ Growth hormone accelerates bone growth.
- B, C, D – Not height-related.
Q91. Which of the following is NOT an adolescent health problem?
A) Mood swings
B) Acne
C) Increase in height
D) Diabetes
✅ Correct Answer: D) Diabetes
Explanation:
- A, B, C – Normal adolescence issues.
- D) ✔ Diabetes is not specific to adolescence.
Q92. Which hormone is also called the “fight or flight” hormone?
A) Thyroxine
B) Adrenaline
C) Testosterone
D) Estrogen
✅ Correct Answer: B) Adrenaline
Explanation:
- A, C, D – Not stress-related.
- B) ✔ Adrenaline prepares body for emergencies.
Q93. Which organ is enlarged in boys during puberty, forming Adam’s apple?
A) Thyroid
B) Larynx
C) Pituitary
D) Oesophagus
✅ Correct Answer: B) Larynx
Explanation:
- A, C, D – Other organs.
- B) ✔ Larynx enlargement → Adam’s apple.
Q94. Which organ connects brain and pituitary gland?
A) Hypothalamus
B) Medulla
C) Cerebrum
D) Cerebellum
✅ Correct Answer: A) Hypothalamus
Explanation:
- A) ✔ Hypothalamus controls pituitary secretion.
- B, C, D – Not involved.
Q95. Which of these is NOT a change in boys during puberty?
A) Voice deepens
B) Facial hair grows
C) Menstruation starts
D) Broad shoulders
✅ Correct Answer: C) Menstruation starts
Explanation:
- A, B, D – Male traits.
- C) ✔ Menstruation is in girls.
Q96. Which organ secretes digestive enzymes and hormones?
A) Pancreas
B) Liver
C) Pituitary
D) Thyroid
✅ Correct Answer: A) Pancreas
Explanation:
- A) ✔ Pancreas → dual gland (enzymes + insulin).
- B, C, D – Not dual-role glands.
Q97. Which disease spreads by sharing infected needles?
A) Goitre
B) Diabetes
C) AIDS
D) Rickets
✅ Correct Answer: C) AIDS
Explanation:
- A, B, D – Not spread this way.
- C) ✔ HIV spreads via infected needles.
Q98. Which hormone helps in stress management by regulating metabolism?
A) Adrenaline
B) Thyroxine
C) Growth hormone
D) Estrogen
✅ Correct Answer: A) Adrenaline
Explanation:
- A) ✔ Adrenaline → quick response in stress.
- B, C, D – Not emergency regulators.
Q99. Which food is rich in iodine, preventing goitre?
A) Green vegetables
B) Iodized salt
C) Milk
D) Citrus fruits
✅ Correct Answer: B) Iodized salt
Explanation:
- A, C, D – Contain nutrients but not iodine.
- B) ✔ Iodized salt prevents goitre.
Q100. Adolescence is the stage between:
A) Childhood and adulthood
B) Infancy and childhood
C) Adulthood and old age
D) Birth and infancy
✅ Correct Answer: A) Childhood and adulthood
Explanation:
- A) ✔ Adolescence = transition from childhood to adulthood.
- B, C, D – Other life stages.
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