Chapter Exam

Unit 4A: Endocrine System and Chemical Coordination — Online MCQ Test

Q: Which gland is known as the 'master gland' of the human endocrine system?

Answer: B. Pituitary gland — The pituitary gland controls many other endocrine glands by secreting regulatory hormones, so it is called the master gland.

Q: Insulin is secreted by which type of cells in the pancreas?

Answer: B. Beta cells — Insulin is produced by the beta cells of the Islets of Langerhans in the pancreas.

Q: A person with deficiency of iodine is likely to develop enlargement of which gland?

Answer: B. Thyroid gland — Iodine is essential for thyroxine synthesis. Its deficiency often causes goitre, which is enlargement of the thyroid gland.

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 for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR ZOOLOGY. 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.

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Unit 4A: Endocrine System and Chemical Coordination — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR ZOOLOGY — Unit 4A: Endocrine System and Chemical Coordination, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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.

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.

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.

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.

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