Advertisements
Advertisements
प्रश्न
Differentiate between Myelinated and non-myelinated axons.
Advertisements
उत्तर
| Myelinated axons | non-myelinated axons | |
| 1. | Nerve impulse conduction is saltatory. | Nerve impulse conduction is smooth. |
| 2. | Myelinated axon have a myelin sheath. | Myelin sheath is absent. |
| 3. | Node of Ranvier is present between adjacent myelin sheaths. | Node of Ranvier is absent. |
| 4. | Found in the brain, the spinal cord, the cranial and spinal nerves | Found in autonomous and somatic neural systems |
| 5. | Schwann cells are observed inside the myelin sheath | Schwann cells are not observed inside the myelin sheath |
| 6. | Schwann cells in axons generate myelin sheaths. | The myelin sheath is lacking. |
| 7. | Voltage-gated ion channels are concentrated at the nodes, and depolarization only occurs there. | Voltage-gated ion channels are found throughout the axon, and depolarization occurs along the length of the nerve fibre. |
| 8. | Ion exchange can only happen at the nodes. | Ion exchange happens over the surface. |
APPEARS IN
संबंधित प्रश्न
Draw a labelled diagram of the following:
Neuron
Distinguish between Impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
Draw neat and labelled diagrams of a myelinated neuron
With the help of a suitable diagram describe the structures of a neuron.
Describe three kinds of nerves, giving the example of each.
State whether the following statement is true (T) or false (F):
Each neuron consists of three parts called cell body, cyton and axon.
Describe the two parts of the nervous system.
what do we refer to in the nervous system when we say:
sensory, motors and association ……………….
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
axon endings → nucleus → Dendrites → axon → perikaryon → Dendron(Neutron structure)
Brain is a part of _________ nervous system.
Compare and contrast.
Sympathetic Nervous System and Parasympathetic Nervous System
All of the following are associated with the myeline sheath except
At the end of repolarization, the nerve membrane gets hyperpolarized. Why?
Nerve cells do not possess ______
Impulses travels rapidly in ______ neurons.
Which nerves transmit impulses from the central nervous system towards muscle cells?
Explain the function of the neuron.
Each branch of the axon terminates as a bulb-like structure called ______
The mammalian nervous system uses both electrical and chemical means to send signal via neurons. Which part of the neuron receives impulses?
Distinguish between the following pair:
Nerve impulse and flow of electricity (transmission and speed)
