Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Endocrine System

1. Injury to adrenal cortex is not likely to affect the secretion of which one of the following?
a) aldosterone
b) cortisol
c) Adrenaline
d) both adrostenedione and dehydroepiandrosterone

2. Toxic agents present in food which interfere with thyroxine synthesis lead to the development of
a) toxic goitre
b) cretinism
c) simple goitre
d) thyrotoxicosis
Endocrine System

3. Low Ca++ in the body fluid may be the cause of
a) tetany
b) gout
c) anaemia
d) angina pectoris

4. Which one of the following pair of organs includes only the endocrine glands?
a) thymus and testes
b) adrenal and ovary
c) pancreas and parathyroid
d) adrenal and parathyroid

5. The contraction of gall bladder is due to
a) gastrin
b) secretin
c) cholecystokinin
d) enterogastrone

6. Gastric secretion is stopped by hormone
a) gastrin
b) enterogastrone
c) cholecystokinin

7. The blood calcium level is lowered by the deficiency of
a) thyroxine
b) calcitonin
c) parathormone
d) both calcitonin and parathormone

8. A health disorder that results from the deficiency of thyroxine in adults and characterized by
i) a low metabolic rate ii) increase in body and iii) tendency to retain water in tissues is
a) cretinism
b) myxodema
c) simple goitre
d) hypothyroidism

9. Select the correct matching of a hormone, its source and function
Hormone Source Function
a) Vassopressin Posterior pituitary Increases loss of water through urine
b) Norepinephrine Adrenal medulla Increases heart beat, rate of respiration and alertness.
c) Prolactin Posterior pituitary Regulates growth of mammary glands and milk formation in females.
d) Glucagon Beta cells of Islets of Langerhans Stimulates glycogenolysis

10. Which one of the following pairs is incorrectly matched?
a) glucagon - beta cells (source)
b) insulin – diabetes mellitus (disease)
c ) somatostatin – delta cells (source)
d) corpus luteum –relaxin (secretion)

Learn more:
Online MCQ test on Endocrine System –> Reproductive system –> Nervous System
1. c) Adrenaline
2. c) simple goitre
3. a) tetany
4. d) adrenal and parathyroid
5. c) cholecystokinin
6. b) enterogastrone
7. c) parathormone
8. b) myxodema
9. b) Norepinephrine - Adrenal medulla - Increases heart beat, rate of respiration and alertness.
10. a) glucagon - beta cells (source)

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