A nerve impulse is transmitted from one neuron to another through the junctions called |
|||
a) |
Neuromuscular junction |
b) |
Neuroreceptor junction |
c) |
Neurosynaptic junction |
d) |
Neuroglandular junction |
A nerve impulse is transmitted from one neuron to another through the junctions called |
|||
a) |
Neuromuscular junction |
b) |
Neuroreceptor junction |
c) |
Neurosynaptic junction |
d) |
Neuroglandular junction |
(c)
Neurosynaptic junction.
A-Dendrites, B-Cell body, C-Axon, D-Nodes of Ranvier, E-Synaptic knob. A neuron is a microscope structure composed of three major parts, i.e., cell body, dendrites and axon. The cell body contains cytoplasm with typical cell organelles and certain granular bodies called Nissl’s gransules
Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and are called dendrites. These fibres transmit impulses towards the cell body. The axon is a long fibres, the distal end of which is branched.
Each branch terminates as a bulb-like structure called synaptic knob which possess synaptic vesicles containing chemicals called neurotransmitters. The axons transmit nerve impulses away from the cell body to a synapse or to a neuro-muscular junction
The afferent nerve fibres transmit impulses |
|
a) |
From tissues/organs to the CNS |
b) |
From the CNS to the smooth muscles |
c) |
From the CNS to the concerned peripheral tissues/organs |
d) |
From the CNS to the involuntary organs |
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