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Q. No.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 |
From NCERT
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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%
From NCERT
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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 |
78%
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Consider the following statements
I. Somatic neural system relays impulses from the CNS to skeletal muscles
II. Autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles
III. Unmyelinated nerve fibres are commonly found in SNS and ANS
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
I. Somatic neural system relays impulses from the CNS to skeletal muscles
II. Autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles
III. Unmyelinated nerve fibres are commonly found in SNS and ANS
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
Subtopic: Nervous System |
79%
From NCERT
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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
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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Which of the following processes take place during the establishment of a resting potential in the axon of a healthy human neuron?
(i) active transport
(ii) facilitated diffusion
(iii) respiration
1. (i), (ii) and (iii)
2. (ii) only
3. (i) and (iii) only
4. (i) and (ii) only
(i) active transport
(ii) facilitated diffusion
(iii) respiration
1. (i), (ii) and (iii)
2. (ii) only
3. (i) and (iii) only
4. (i) and (ii) only
Subtopic: Origin of Resting Membrane Potential |
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Which of the following statements about a neuron in a healthy human is/are correct?
1. Transport across its cell membrane can occur by exocytosis.
2. It contains the gene that codes for insulin.
3. It contains circular DNA.
1. 1, 2 and 3
2. 1 and 3 only
3. 1 and 2 only
4. 2 and 3 only
1. Transport across its cell membrane can occur by exocytosis.
2. It contains the gene that codes for insulin.
3. It contains circular DNA.
1. 1, 2 and 3
2. 1 and 3 only
3. 1 and 2 only
4. 2 and 3 only
Subtopic: Neuroanatomy |
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Which of the following processes involve ions?
(i) contraction of a muscle
(ii) transmission of a nerve impulse across a synapse
(iii) transfer of light energy into chemical energy in photosynthesis
(iv) oxidative phosphorylation in a mitochondrion
1. (ii) and (iii) only
2. (i) and (ii) only
3. (iii) and (iv) only
4. (i), (ii), (iii) and (iv)
(i) contraction of a muscle
(ii) transmission of a nerve impulse across a synapse
(iii) transfer of light energy into chemical energy in photosynthesis
(iv) oxidative phosphorylation in a mitochondrion
1. (ii) and (iii) only
2. (i) and (ii) only
3. (iii) and (iv) only
4. (i), (ii), (iii) and (iv)
Subtopic: Origin of Resting Membrane Potential |
84%
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The transmission of nerve impulses at a synapse is unidirectional.
Which of the features of the transmission of nerve impulses given below have a role in maintaining the unidirectional transmission?
1 Exocytosis of neurotransmitter at the presynaptic membrane
2 Neurotransmitter hydrolyzing enzyme found on the postsynaptic membrane
3 Neurotransmitter receptors found on the postsynaptic membrane
4 Sodium gated channels on the postsynaptic membrane
1. 2 and 4 only
2. 1, 2 and 3 only
3. 1, 3 and 4 only
4. 1 and 4 only
Subtopic: Synapse |
61%
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