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Question
Assertion: Receptors are crucial to body’s communication process.
Reason: Receptors are proteins.
Options
Assertion and reason both are correct statement but reason does not explain assertion.
Assertion and reason both are correct and reason explains the assertion.
Both assertion and reason are wrong statement.
Assertion is correct statement reason is wrong statement.
Assertion is wrong statement reason is correct statement.
Solution
Assertion and reason both are correct statement but reason does not explain assertion.
Explanation:
Neurotransmitters are small molecular that bind to the receptor for a very short time to transfer message to it and depart quickly unchanged after transferring the message, the receptor then forwards the message inside the cell. Receptors are proteins and they participate in the communication system of our body.
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Match the class of compounds given in Column I with their functions given in Column II.
| Column I | Column II |
| (i) Antagonists | (a) Communicate message between two neurons and that between neurons to muscles |
| (ii) Agonists | (b) Bind to the receptor site and inhibit its natural function |
| (iii) Chemical messenger | (c) Crucial to body’s communication process |
| (iv) Inhibitors | (d) Mimic the natural messenger |
| (v) Receptors | (e) Inhibit activities of enzymes |
Assertion: Chemical messengers are chemicals that enable communication of message between two neurons or between neurons and muscles.
Reason: Chemicals enter the cell through receptor.
Assertion: Chemical messenger gives message to the cell without entering the cell.
Reason: Chemical messenger is received at the binding site of receptor proteins.
Assertion: Receptor proteins show selectivity for one chemical messenger over the other.
Reason: Chemical messenger binds to the receptor site and inhibits its natural function.
