Question

Given alongside are the diagrammatic sketches of some endocrine glands. Observe the figures and answer the following questions:

(i) Label the parts numbered 1 to 5.
(ii) Name the hormones secreted by (2) and (5).
(iii) Which chemicals in our body are greatly affected by hormones?
(iv) What is the chemical nature of hormones?
(v) Name the elements related to the functioning of hormones secreted by the structure (2) and (5).

Answer 1

(i)
1. Larynx.
2. Left lobe of the thyroid gland.
3. Trachea (windpipe).
4. Oesophagus.
5. Parathyroid glands.

(ii) Structure (2) secretes thyroxin hormone and structure (5) secretes parathormone.

(iii) Enzymes; which constitute the enzyme system of the body.

(iv) Hormones may be proteins, amino acids or steroids.

(v) Iodine is related to the functioning of glands (2) calcium, phosphorus is related to the functioning of the gland (5).