(a) What are hormones? (b) In a tabular form, state four differences between nervous coordination and hormonal coordination in humans. (c) State three effec...

(a) What are hormones?

(b) In a tabular form, state four differences between nervous coordination and hormonal coordination in humans.

(c) State three effects each of: (i) Over-secretion (ii) Under-secretion of thyroxin on mammals.

(d) Make a diagram 10 - 12cm long of the reflex arc and label fully.