Control and Coordination

1

Explain giving reasons the bending of the shoot tip of a plant towards light source coming from one side of the plant.

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2

How do nerve impulses travel in the body ? Explain.

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3

Why is the use of iodised salt advisable ? Name the disease caused due to deficiency of iodine in our diet and state its one symptom.

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4

Write a and b in the given flow chart of neuron through which information travels as an electrical impulse.

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5

Name the hormones secreted by the following endocrine glands and specify one function of each:

(a) Thyroid (b) Pituitary (c) Pancreas

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6

Mention any one point of difference between Pepsin and Trypsin.

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7

Draw a neat diagram of human brain and label Medulla and Cerebellum. Write the functions of the above mentioned parts.

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8

"Both overproduction and underproduction of Growth hormone leads to disorders in the body." Explain

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