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#8 | Nervous Tissue
(Zoology) > Structural Organisation in Animals
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Related Practice Questions :
Nervous tissue is made up of neurons and neuroglial cells. Point out which of the following statement about these two cells is false:
| I. | Neuroglia make up more than one-half the volume of neural tissue in our body |
| II. | Neuroglia protect and support neurons |
| III. | When a neuron is suitably stimulated, an electrical disturbance is generated which swiftly travels along its cytosol |
| IV. | This disturbance at the neuron endings triggers stimulation or inhibition of adjacent neurons or other cells |
1. Only I and IV
2. Only II and III
3. Only III
4. Only IV
70%
Level 2: 60%+
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Assertion : Neurons are said to possess the property of excitability.
Reason : Neurons can get excited by a given stimulus.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
84%
Level 1: 80%+
Hints
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Non-myelinated nerve fibres do not possess nodes of Ranvier. |
| Reason (R): | This is due to the absence of nissl’s bodies in node of Ranvier. |
In light of the above statement, choose the most appropriate answer from the options given below:
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
53%
Level 3: 35%-60%
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