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Given below is the outline of the human body showing the important glands:

Given below is the outline of the human body showing the important glands. Name the glands marked 1 to 4. Name the hormone secreted by part 2. Give one important function of this hormone. Name the endocrine part of the part numbered 3. Why is the part labelled 1 called the master gland? Which part of the forebrain controls the gland labelled 1? Name the gland that secretes the emergency hormone. ICSE 2016 Biology Solved Question Paper.

(i) Name the glands marked 1 to 4.

(ii) Name the hormone secreted by part 2. Give one important function of this hormone.

(iii) Name the endocrine part of the part numbered 3.

(iv) Why is the part labelled 1 called the master gland? Which part of the forebrain controls the gland labelled 1?

(v) Name the gland that secretes the 'emergency hormone'.

Endocrine System

ICSE 2016

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Answer

(i) The glands 1 to 4 are:

  • 1 → Pituitary gland
  • 2 → Thyroid gland
  • 3 → Pancreas
  • 4 → Adrenal gland

(ii) The hormone secreted by part 2 is Thyroxine.
Thyroxine controls the basal metabolic rate (BMR) of the body. It also influences the general growth of the body, ossification of bone, body temperature, mental development.

(iii) Islet of Langerhans.

(iv) The part labelled 1 (i.e., the Pituitary gland) is called the master gland as it controls the secretion of other glands. Hypothalamus controls the Pituitary gland.

(v) Adrenal medulla (part of Adrenal gland)

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