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Zoology MCQs for NEET — Practice Questions with Answers

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Multipolar axons

A. One axon and two or more dendrites B. One dendrites and two or more axon C. Multiple dendrites and no axon D. No dendrites and multiple axon

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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Unipolar neuron means

A. Cell body with one axon only B. Cell body with dendrite only C. Only cell body D. An axon and dendrite with a cell body

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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Which of the following is found usually in the embryonic stage?

A. Unipolar B. Bipolar C. Multipolar D. Both B and C

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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The gaps between two adjacent myelin sheath are called

A. Nodes of Ranvier B. Axon terminal C. Synaptic knob D. Schwan cell

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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In retina of eye which kind of axons are found?

A. Multipolar B. Bipolar C. Unipolar D. Apolar

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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Unmyelinated nerve fibres are enclosed by

A. Schwann cells B. Myelin sheath C. No shwann cells and myelin sheath D. Schwann cells but not myelin sheath

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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Unmyelinated nerve fibres are found in

A. Autonomous B. Somatic Neural systems C. Both A and B D. CNS

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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Myelinated nerve fibres are found in

A. Cranial nerves B. Spinal nerves C. Both A and B D. Not in CNS

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Explanation

NCERT page number 317

21.3 Neuron As Structural And Functional Unit Of Neural System

Neural Control And Coordination

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Neurons are excitable cells because

A. Their membranes are in unpolarized state B. There membranes are very light to create channels C. They have got neurotransmitters D. Their membranes are in polarized state

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Explanation

NCERT page number 317

21.3.1 Generation and Conduction of Nerve impulses

Neural Control And Coordination

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The membrane of neuron is polarized because

A. Different kind of lipids are there over membrane B. Different kinds of ion channels are there in membrane C. These ion channels are selectively permeable to different ions D. Both B and C

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Explanation

NCERT page number 317

21.3.1 Generation and Conduction of Nerve impulses

Neural Control And Coordination

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