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Biology : XI-CH21 – Neural Control and Co-ordination – Assertion and Reason

Read the assertion and reason carefully to mark the correct option.

10 Random question from this chapter are displayed, you can take the quiz multiple times to cover all questions

1 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: After hearing a sound, the nerve impulse passes from neurons to the brain.

Reason: The neurons which pass nerve impulses from the body organ to the brain is called afferent neuron.

2 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Conditioned reflex requires previous experience.

Reason: It is controlled by cerebrum initially.

3 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Surface of cerebrum is highly folded.

Reason: To increase the area for having more neurons.

4 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Cerebrospinal fluid is present throughout the central nervous system.

Reason: CSF has no function.

5 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: The chemical stored in the synaptic vesicles are termed as neurotransmitters.

Reason: Synaptic vesicles release these chemicals in the synaptic cleft.

6 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Owl can see at night.

Reason: They possess a large number of rods and few cones in their retina.

7 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Unmyelinated fibres are without myelin sheath.

Reason: Schwann cells are absent in unmyelinated fibres.

8 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Spinal cord has a column of both grey and white matter.

Reason: Grey matter forms the central spinal canal.

9 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Impulse transmission across an electrical synapse is always faster than that across a chemical synapse.

Reason: At electrical synapses, the membranes of pre- and post-synaptic neurons are in very close proximity.

10 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: In a myelinated nerve fibre the impulse jumps from one node of Ranvier to the other.

Reason: Exchange of ions takes place only at node of Ranvier.

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