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Question

(a) What substances are made by endocrine glands?
(b) What is the function of receptors and effectors in our body?

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Solution

(a) The endocrine glands secrete chemical substances called hormones.
(b) Receptors receive stimuli from the surrounding environment and send the messages conveyed by them to the spinal cord and the brain as electrical impulses through the sensory nerves. On the other hand, effectors respond to stimuli according to the instructions sent from the nervous system.

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