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What is reflex action? Explain the mechanism of reflex action with a suitable example.
Name two hormones secreted by pancreas. Write one function of each hormone named.
(a) What are “hormones”?
(b) List four characteristics of hormones
(c) Name the hormone required for the following:
Functioning of mammary glands
Regulation of calcium and phosphate
Lowering of blood glucose
Development of moustache and beard in human malc.
What is neuron?
(a) What is
With labelled diagrams describe an activity to show that light and gravity change the direction that plant parts grow in.
(b) Mention the role of each of the following plant hormones:
· Abscisic acid.
What are nastic and curvature movements? Give one example of each.
Name the three major regions of human brain. Which part of brain maintains posture and equilibrium of the body?
Maintenance of Posture and Equilibrium. Cerebellum.
(a) Distinguish between voluntary and involuntary actions of our body.
(b) Choose involuntary actions, amongst the following:
Reading, Beating of heart, Salivation in the mouth on viewing tasty food, Talking.
Write the function of hormone thyroxine in our bodies.
What are phytohormones?
Name the hormone responsible for regulation of
Explain the cause of shoots of the plant bending towards light?