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Q. No.In the peripheral neural system, Schwann cells surround the axons of:
I:
Myelinated nerve fibres
II:
Unmyelinated nerve fibres
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Â Nervous System |
 58%
Level 3: 35%-60%
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How many of the given statements are correct?
1. 0
2. 1
3. 2
4. 3
| I: | Hind brain and midbrain make up the brain stem. |
| II: | The hindbrain comprises pons, cerebellum and medulla. |
| III: | The forebrain consists of cerebrum, thalamus and hypothalamus. |
2. 1
3. 2
4. 3
Subtopic: Â Hind & Mid Brain |Â Fore Brain |
 57%
Level 3: 35%-60%
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Depolarisation of axonal membrane is due to influx of sodium ions. |
| Statement II: | Repolarisation of axonal membrane is due to efflux of sodium ions. |
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
 65%
Level 2: 60%+
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The sodium potassium pump transports:
1. three sodium ions from outside to inside a cell.
2. three sodium ions from inside to outside a cell.
3. two potassium ions from outside to inside a cell.
4. both 2 and 3
1. three sodium ions from outside to inside a cell.
2. three sodium ions from inside to outside a cell.
3. two potassium ions from outside to inside a cell.
4. both 2 and 3
Subtopic: Â Action Potential |
Level 4: Below 35%
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Myelination of axons of the central nervous system is brought about by:
| 1. | microglia | 2. | asrocytes |
| 3. | oligodendrocytes | 4. | Schwann cells |
Subtopic: Â Nervous System |
 57%
Level 3: 35%-60%
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Cerebellum is mainly involved in:
1. consciousness
2. muscle coordination
3. homeostasis
4. sense reception
1. consciousness
2. muscle coordination
3. homeostasis
4. sense reception
Subtopic: Â Hind & Mid Brain |
Level 3: 35%-60%
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Match Column I with Column II:
Codes:
| Column I | Column II | ||
| A | Sensory neurons | P | carry signals from the CNS to effectors (muscles or glands) |
| B | Motor neurons | Q | connect sensory and motor neurons |
| C | Interneurons | R | transmit signals from sensory receptors to the central nervous system |
| A | B | C | |
| 1. | P | Q | R |
| 2. | Q | P | R |
| 3. | R | P | Q |
| 4. | R | Q | P |
Subtopic: Â Nervous System |
 81%
Level 1: 80%+
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As a nerve impulse passes along an axon:
1. The membrane potential changes from positive to negative and then back again
2. Sodium ions flow out through ion channels and potassium ions flow in
3. Sodium channels open as the membrane potential becomes less negative
4. The sodium-potassium pump moves sodium ions into the cell
1. The membrane potential changes from positive to negative and then back again
2. Sodium ions flow out through ion channels and potassium ions flow in
3. Sodium channels open as the membrane potential becomes less negative
4. The sodium-potassium pump moves sodium ions into the cell
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
Level 3: 35%-60%
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Match List I with List II:
Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-I, B-III, C-II, D-IV
3. A-II, B-I, C-III, D-IV
4. A-II, B-III, C-I, D-IV
| List I | List II | ||
| A. | Pons | I. | Provides additional space for Neurons, regulates posture and balance |
| B. | Hypothalamus | II. | Controls respiration and gastric secretions |
| C. | Medulla | III. | Connects different regions of the brain |
| D. | Cerebellum | IV. | Neuro secretory cells |
Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-I, B-III, C-II, D-IV
3. A-II, B-I, C-III, D-IV
4. A-II, B-III, C-I, D-IV
Subtopic: Â Nervous System |Â Hind & Mid Brain |Â Fore Brain |
 80%
Level 1: 80%+
NEET - 2024
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The mechanism by which neurotransmitters are released into the synaptic cleft from the presynaptic neuron involves:
1. Simple diffusion
2. Active transport
3. Exocytosis
4. Endocytosis
1. Simple diffusion
2. Active transport
3. Exocytosis
4. Endocytosis
Subtopic: Â Synapse |
 59%
Level 3: 35%-60%
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