Unit 4A: Endocrine System and Chemical Coordination — Online MCQ Test
ZOOLOGY · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board
Practice Unit 4A: Endocrine System and Chemical Coordination with a free chapter-wise online MCQ test.
This chapter covers: Focusing on hormonal control this chapter details human endocrine glands hormone actions pituitary thyroid adrenal pancreas secretion roles and endocrine disorders..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Unit 4A: Endocrine System and Chemical Coordination — Important Questions & Answers
Which gland is known as the 'master gland' of the human endocrine system?
- A. Thyroid gland
- B. Pituitary gland
- C. Adrenal gland
- D. Pancreas
Answer: B. Pituitary gland
The pituitary gland controls many other endocrine glands by secreting regulatory hormones, so it is called the master gland.
The pituitary gland controls many other endocrine glands by secreting regulatory hormones, so it is called the master gland.
Insulin is secreted by which type of cells in the pancreas?
- A. Alpha cells
- B. Beta cells
- C. Delta cells
- D. Acinar cells
Answer: B. Beta cells
Insulin is produced by the beta cells of the Islets of Langerhans in the pancreas.
Insulin is produced by the beta cells of the Islets of Langerhans in the pancreas.
A person with deficiency of iodine is likely to develop enlargement of which gland?
- A. Pituitary gland
- B. Thyroid gland
- C. Adrenal gland
- D. Pancreas
Answer: B. Thyroid gland
Iodine is essential for thyroxine synthesis. Its deficiency often causes goitre, which is enlargement of the thyroid gland.
Iodine is essential for thyroxine synthesis. Its deficiency often causes goitre, which is enlargement of the thyroid gland.
Which of the following best explains the role of glucagon?
- A. It lowers blood sugar by promoting glycogenesis
- B. It raises blood sugar by promoting glycogen breakdown
- C. It increases calcium deposition in bones
- D. It controls growth of body tissues
Answer: B. It raises blood sugar by promoting glycogen breakdown
Glucagon acts mainly on the liver to stimulate glycogenolysis, increasing blood glucose level.
Glucagon acts mainly on the liver to stimulate glycogenolysis, increasing blood glucose level.
Which of the following is the most appropriate explanation for diabetes mellitus?
- A. Excess secretion of ADH leading to reduced urine output
- B. Deficiency of insulin causing persistent high blood sugar
- C. Deficiency of thyroxine causing low metabolic rate
- D. Excess secretion of glucagon causing low blood sugar
Answer: B. Deficiency of insulin causing persistent high blood sugar
Diabetes mellitus occurs due to insufficient insulin secretion or poor insulin action, resulting in elevated blood glucose levels.
Diabetes mellitus occurs due to insufficient insulin secretion or poor insulin action, resulting in elevated blood glucose levels.