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प्रश्न
Write a short note on the following:
Synapse
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उत्तर
- A nerve impulse is transmitted from one neuron to another through junctions called synapses.
- A synapse is formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron, which may or may not be separated by a gap called synaptic cleft.
- There are two types of synapses, namely, electrical synapses and chemical synapses.
संबंधित प्रश्न
Compare the following:
Resting potential and action potential
A person is showing symptoms like increased BMR, heart rate, pulse rate, blood pressure and deposition of fats in eye sockets. Name the disease he is suffering from.
Sketch and label formation of typical spinal nerve.
Long answer question.
Explain the process of conduction of nerve impulses up to the development of action potential.
Give function of astrocytes in nervous system.
Complete the flowchart of the process of conduction of nerve impulses.
| Application of stimulus on a resting nerve |
| ⇓ |
| Permeability of membrane changes |
| ⇓ |
| ______________________________ |
| ⇓ |
| Positive ions inside axon increases |
| ⇓ |
| ________________________________ |
| ⇓ |
| Polarity reverses and depolarisation takes place |
| ⇓ |
| Repolarisation - potassium gates open |
| ⇓ |
| ______________________________ |
| ⇓ |
| ______________________________ |
| ⇓ |
| Axoplasm becomes negatively charged and ECF becomes positive |
Which ions is the resting membrane more permeable to?
What is the average potential difference across the nerve cell membrane?
Under which of the following conditions will the ionic gradients across the resting membrane be maintained?
Which of the following is TRUE for the external tissue fluid in polarized state?
Identify the correct path of transmission of nerve impulse.
Which of the following statements is TRUE for medullated nerve fibre?
When stimulus is applied to a membrane of neuron, it causes rapid influx of ____________.
What is the difference between electrical transmission and chemical transmission?
The electronegativity inside the membrane is due to
