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प्रश्न
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 |
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उत्तर
| Application of stimulus on a resting nerve |
| ⇓ |
| Permeability of membrane changes |
| ⇓ |
| Na+ ions diffuse into the neuron from the ECF |
| ⇓ |
| Positive ions inside axon increases |
| ⇓ |
|
Membrane potential changes from – 70mV to + 30mV |
| ⇓ |
| Polarity reverses and depolarisation takes place |
| ⇓ |
| Repolarisation - potassium gates open |
| ⇓ |
| K+ ions diffuse out of the axon |
| ⇓ |
| The inside of the membrane (becomes less and less positive) becomes negative once again |
| ⇓ |
| Axoplasm becomes negatively charged and ECF becomes positive |
संबंधित प्रश्न
Give function of astrocytes in nervous system.
Define Saltatory conduction.
Match the Column - I with Column - II:
| Column I | Column II | ||
| i. | P - wave | p. | Depolarisation of ventricles |
| ii. | QRS complex | q. | Repolarisation of ventricles |
| iii. | T - wave | r. | Coronary ischemia |
| s. | Development of atria | ||
| t. | Repolarisation of atria |
Neurotransmitters are removed from synaptic cleft by ____________ after transmission of impulse.
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?
When stimulus is applied to a membrane of neuron, it causes rapid influx of ____________.
Explain the process of the transport and release of a neurotransmitter with the help of a labelled diagram showing a complete neuron, axon terminal and synapse.
Write one word for the following:
Point of contact between two nerve cells.
During the phase of depolarisation of nerve impulse, ______.
