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Q. No.Consider the following statements:
I. Acetycholine is released at the electrical synapse
II. Impulse conduction across electrical synapses is faster than chemical synapses
III. It is more difficult to regulate an electrical synapse than a chemical synapse
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III only
Subtopic: Synapse |
80%
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Read the following statements.
1. A and B both are incorrect
2. Only statement A is incorrect
3. Only statement B is incorrect
4. A and B both are correct
| Statement A: | Excitable cells called neuroglial cells make up more than one-half the volume of neural tissue in our body. |
| Statement B: | The greatest control over the body’s responsiveness to changing conditions is exerted by neural tissue. |
1. A and B both are incorrect
2. Only statement A is incorrect
3. Only statement B is incorrect
4. A and B both are correct
Subtopic: Nervous System |
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Assertion (A) : Brain is an organ found in vertebrates exhibiting higher levels of organisation.
Reason (R) : Brain comprises four basic types of tissues which are organised in a specific proportion and pattern.
Choose the correct option from the following
1. (A) and (R) are true and (R) is the correct explanation of (A)
2. (A) and (R) are true but (R) is not the correct explanation of (A)
3. (A) is true, (R) is false
4. (A) is false, (R) is true
Reason (R) : Brain comprises four basic types of tissues which are organised in a specific proportion and pattern.
Choose the correct option from the following
1. (A) and (R) are true and (R) is the correct explanation of (A)
2. (A) and (R) are true but (R) is not the correct explanation of (A)
3. (A) is true, (R) is false
4. (A) is false, (R) is true
Subtopic: Neuroanatomy |
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Consider the following statements and select the correct option
Statement A: Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.
Statement B: Electrical synapses are rare in our body.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct
Statement A: Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.
Statement B: Electrical synapses are rare in our body.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct
Subtopic: Synapse |
86%
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Assertion (A): The rate of conduction of nerve impulse is higher in myelinated neurons.
Reason (R): Saltatory type of impulse conduction is present in the myelinated nerve fibres.
In the light of above statements, select the correct answer from the options given below
1. Both (A) and (R) are true and (R) is the correct explanation of (A)
2. Both (A) and (R) are true but (R) is not the correct explanation of (A)
3. (A) is false, (R) is true
4. (A) is true, (R) is false
Reason (R): Saltatory type of impulse conduction is present in the myelinated nerve fibres.
In the light of above statements, select the correct answer from the options given below
1. Both (A) and (R) are true and (R) is the correct explanation of (A)
2. Both (A) and (R) are true but (R) is not the correct explanation of (A)
3. (A) is false, (R) is true
4. (A) is true, (R) is false
Subtopic: Neuroanatomy |
80%
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Assertion (A): Myelin sheath is produced by the Schawann cells
Reason (R):In myelinated nerve fibre, myelin sheath is present throughout
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason (R):In myelinated nerve fibre, myelin sheath is present throughout
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
61%
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Assertion (A): Repolarisation of the axonal membrane results in the development of positive charge on the outer side and negative charge on the inner side
Reason (R): Nerve impulse is another name for action potential
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Nerve impulse is another name for action potential
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Origin of Resting Membrane Potential | Action Potential |
86%
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Assertion (A): The nerve impulse generated at a point in the neuron faces resistance at the sites where myelin sheath is present
Reason (R): At sites of myelin sheath axonal membrane is not exposed to the extra cellular fluid
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason (R): At sites of myelin sheath axonal membrane is not exposed to the extra cellular fluid
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
55%
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Assertion (A): Acetylcholine-esterase is present in the muscle cell or post synaptic neuron
Reason (R): Acetylcholine-esterase breaks down acetylcholine into acetate and choline
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is false but (R) is true.
4. Both (A) and (R) are false.
Reason (R): Acetylcholine-esterase breaks down acetylcholine into acetate and choline
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is false but (R) is true.
4. Both (A) and (R) are false.
Subtopic: Synapse |
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Assertion (A): Procenephalon becomes thalamus and hypothalamus
Reason (R): Mesencephalon becomes mid-brain
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Mesencephalon becomes mid-brain
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
80%
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