Draw a diagram showing endocrine glands in a male body. Label the following glands on it:
(i) Pituitary
(ii) Thyroid
(iii) Adrenal
(iv) Testes

5

(a)

What are hormones? State one function of each of the following hormone
(i) Thyroxin
(ii) Insulin.

5

(a)

Distinguish between voluntary and involuntary actions of our body.

5

(a)

What constitutes the central and peripheral nervous systems? How are the components of central nervous system protected?

5

(a)

Name various plant hormones. Also give their physiological effects on plant growth and development.

5

(a)

What are reflex action? Give two examples. Explain a reflex arc.

5

(a)

"Nervous and hormonal system together perform the function of control and coordination in human beings." Justify the statement.

5

(a)

Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?

5

(a)