The diagram given below represents an endocrine gland

Human Physiology (10)

The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions:

1. Identify the endocrine gland. Where is it located?
2. Why is the above gland referred to as the 'Master gland'?
3. Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus?
4. Explain the term 'Hormone'. What is the role of Tropic hormones in the human body?
5. Which lobe of the above gland secretes:
   1. Oxytocin
   2. ACTH
   3. Growth hormone

Answer

(i) Pituitary gland.

Hangs from hypothalamus

(ii) Controls the secretions of other endocrine glands/regulates the activities of other endocrine glands.

(iii) Vasopressin / ADH

Diabetes mellitus is due to deficiency of insulin/ high level of sugar in blood, urine has sugar.

Diabetes insipidus: Normal sugar in blood, urine free of sugar / urine loaded with water.

(iv) It is the secretion of an endocrine gland, which is transported by blood and acts on target organs or cells.

Secreted by pituitary gland and stimulates other endocrine glands to secrete their hormones.

(v)

1 - Posterior/ neurohypophysis

2 - Anterior / adenohypophysis

3 - Anterior /adenohypophysis