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Q. No.Visceral nervous system:
1.
is a part of PNS
2.
is made up of Nerves, Fibres, Ganglia and Plexuses
3.
transmits information from CNS to the viscera and viscera to CNS
4.
All of the above
Subtopic: Nervous System |
88%
Level 1: 80%+
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Five events in the transmission of nerve impulse across the synapse:
| A. | Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron |
| B. | Neurotransmitter binds to the receptor on post-synaptic membrane. |
| C. | Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter releases into synaptic cleft |
| D. | Depolarization of pre-synaptic membrane |
| E. | Arrival of an action potential at the axon terminal |
In which sequence do these events occur?
| 1. | E → D → C → B → A |
| 2. | A → B → C → D → E |
| 3. | A → B → D → C → E |
| 4. | E → D → C → A → B |
Subtopic: Action Potential |
77%
Level 2: 60%+
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The regions neither clearly sensory nor motor in function in CNS are
| 1. | Association area |
| 2. | Ascending area |
| 3. | Descending area |
| 4. | Axonal area |
Subtopic: Diencephalon |
92%
Level 1: 80%+
Hints
In the given diagram, identify A , B and C
| A | B | C | |
| 1. | Cerebellum | Medulla | Pons |
| 2. | Cerebrum | Medulla | Pons |
| 3. | Cerebrum | Pons | Olfactory lobe |
| 4. | Corpus callosum | Cerebrum | Medulla |
Subtopic: Neuroanatomy |
79%
Level 2: 60%+
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Which of the following statements is/are true?
| I: | The resting axonal membrane is relatively more permeable to potassium ions and nearly impermeable to sodium ions. |
| II: | Sodium-potassium pump transports 3 Na+ outwards for 2 K+ into the cell. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
86%
Level 1: 80%+
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Select the incorrect statement regarding synapses:
| 1. | Impulse Transmission across a chemical synapse is always faster than that across an electrical synapse. |
| 2. | The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse. |
| 3. | Electrical current can flow directly from one neuron into the other across the electrical synapse. |
| 4. | Chemical synapses use neurotransmitters. |
Subtopic: Origin of Resting Membrane Potential | Synapse |
89%
Level 1: 80%+
NEET - 2022
Hints
The pre-excitation potential difference between the outside and inside of a neuron is called:
1. Reaction potential
2. Resting potential
3. Spike potential
4. Action potential
1. Reaction potential
2. Resting potential
3. Spike potential
4. Action potential
Subtopic: Origin of Resting Membrane Potential |
79%
Level 2: 60%+
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Which of the following neurons are usually found in the embryonic stage?
| 1. | Multipolar | 2. | Unipolar |
| 3. | Bipolar | 4. | Pseudounipolar |
Subtopic: Nervous System |
89%
Level 1: 80%+
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A diagram showing axon terminal and synapse is given. Identify correctly A-D:
| 1. | A | Receptor | C | Synaptic vesicles |
| 2. | B | Synaptic connection | D | K+ |
| 3. | A | Neurotransmitter | B | Synaptic cleft |
| 4. | C | Neurotransmitter | D | Ca2+ |
Subtopic: Action Potential | Synapse |
85%
Level 1: 80%+
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Vomiting is generally preceded by increased salivation, sweating, faster heart beat and a feeling of nausea. It is a complex reflex coordinated by the vomiting centre in the
1. Hypothalamus
2. Medulla of the brain
3. Somatosensory area
4. Motor area of the brain
Subtopic: Hind & Mid Brain |
83%
Level 1: 80%+
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