- 1(current)
Q. No.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: Â Origin of Resting Membrane Potential |Â Synapse |
 89%
Level 1: 80%+
NEET - 2022
Hints
When a neuron is in resting state i.e., not conducting any impulse, the axonal membrane is:
| 1. | equally permeable to both Na+ and K+ ions |
| 2. | impermeable to both Na+ and K+ ions |
| 3. | comparatively more permeable to K+ ions and nearly impermeable to Na+ ions |
| 4. | comparatively more permeable to Na+ ions and nearly impermeable to K+ ions |
Subtopic: Â Origin of Resting Membrane Potential |
 85%
Level 1: 80%+
AIPMT - 2011
Hints
During the propagation of a nerve impulse, the action potential results from the movement of:
1. K+ ions from extracellular fluid to intracellular fluid
2. Na+ ions from intracellular fluid to extracellular fluid
3. K+ ions from intracellular fluid to extracellular fluid
4. Na+ ions from extracellular fluid to intracellular fluid
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
 70%
Level 2: 60%+
AIPMT - 2008
Hints
During the transmission of nerve impulses through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
| 1. | First negative, then positive, and again back to negative |
| 2. | First positive, then negative, and continue to be negative |
| 3. | First negative, then positive, and then continues to be positive |
| 4. | First positive, then negative, and again back to positive |
Subtopic: Â Origin of Resting Membrane Potential |
 77%
Level 2: 60%+
AIPMT - 2007
Hints
In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive:
1. K+ and Na+ out of the cell
2. Na+ into the cell
3. Na+ out of the cell
4. K+ into the cell
Subtopic: Â Origin of Resting Membrane Potential |
 63%
Level 2: 60%+
AIPMT - 2004
Hints
- 1(current)
Q. No.
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