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प्रश्न
Distinguish between Impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
उत्तर
| Impulse conduction in a myelinated nerve fibre | Impulse conduction in an unmyelinated nerve fibre | |
| 1. | In a myelinated nerve fibre, the action potential is conducted from one node to another. | In an unmyelinated nerve fibre, the action potential is not conducted from node to node. It is carried along the whole length of the nerve fibre |
| 2. | The conduction of impulses is faster | The conduction of impulses is slower. |
| 3. | It has less energy. | It has more energy. |
| 4. | In these, buoyancy and the transmission of inspiration are found. | In these, inspiration transmission is found in the form of self-propagating electrical waves. |
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संबंधित प्रश्न
Draw neat and labelled diagrams of a myelinated neuron
Fill in the blanks:
A neuron consists of ________ , _________ and ________.
State whether the following statement is true (T) or false (F):
There are 31 pairs of cranial nerves.
Define the term Neuron.
Complete the following statement by choosing the correct alternative from the choice given in below :
The dorsal root ganglion of the spinal cord contains cell bodies of ________ neurons.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Effector - Sensory neuron - Receptor - Motor neuron - Stimulus - Central nervous system Response (Reflex arc)
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong :
Axon, Dendron, Photon, Cyton
Write whether the following is true or false:
Neurotransmitters are either broken down or reabsorbed after they have conducted an impulse.
___________ nervous system prepares us for the fight or flight responses.
Assertion: The imbalance in concentration of Na+, K+ and proteins generates action potential.
Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
Bipolar neurons are found in ______
Nerve cells do not possess ______
Our body contains a large number of cells ‘L’ which are the longest cells in the body. L has long and short branches called ‘M’ and ‘N’ respectively. There is a gap ‘O’ between two ‘L’ cells, through which nerve impulse transfer by the release of chemical substance ‘P’.
(i) Name the cells L?
(ii) What are M and N?
(iii) What is the gap O?
(iv) Name the chemical substance P?
______ is the gap between the axon of one terminal neuron and the dendrites of next neuron.
The longest fibre on the cell body of a neuron is called ____________.
Which of the following statements about transmission of nerve impulse is incorrect?
What is the correct direction of flow of electrical impulses?
The mammalian nervous system uses both electrical and chemical means to send signal via neurons. Which part of the neuron receives impulses?
The basic structural and functional unit of brain is ______.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Axon endings - Dendrites - Axon - Perikaryon - Dendron (Neuron structur)
