Define/Explain the following terms:
$(1)$ Synapse
$(2)$ Node of Ranvier
$(1)$ Synapse
$(2)$ Node of Ranvier
(N/A) $(1)$ $A$ synapse is a junction between two neurons,formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron,which may or may not be separated by a synaptic cleft.
$(2)$ Myelinated nerve fibres are enveloped with Schwann cells,which form a myelin sheath around the axon. The gaps between two adjacent myelin sheaths are called nodes of Ranvier.
$(2)$ Myelinated nerve fibres are enveloped with Schwann cells,which form a myelin sheath around the axon. The gaps between two adjacent myelin sheaths are called nodes of Ranvier.
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Similar Questions
The specific receptors for neurotransmitters in a synapse are present on . . . . . .
$A$ : Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
$R$ : Transmission across a synapse usually requires neurotransmitters because there is a small space,$i.e.$,synaptic cleft,that separates one neuron from another.
$R$ : Transmission across a synapse usually requires neurotransmitters because there is a small space,$i.e.$,synaptic cleft,that separates one neuron from another.
Medium
View SolutionAcetylcholine is:
Easy
View SolutionWhich of the following statements are correct regarding electrical synapses?
$i.$ At electrical synapses,the membranes of pre- and post-synaptic neurons are in very close proximity.
$ii.$ Electrical current can flow directly from one neuron into the other across these synapses.
$iii.$ Impulse transmission across an electrical synapse is very similar to impulse conduction along a single axon.
$iv.$ Electrical synapses transmit signals using neurotransmitters like acetylcholine.
$v.$ Electrical synapse transmission is very fast.
$vi.$ Electrical synapses are rare in our system.
$i.$ At electrical synapses,the membranes of pre- and post-synaptic neurons are in very close proximity.
$ii.$ Electrical current can flow directly from one neuron into the other across these synapses.
$iii.$ Impulse transmission across an electrical synapse is very similar to impulse conduction along a single axon.
$iv.$ Electrical synapses transmit signals using neurotransmitters like acetylcholine.
$v.$ Electrical synapse transmission is very fast.
$vi.$ Electrical synapses are rare in our system.
Medium
View SolutionWhat happens if $GABA$ is released at the synapse?
Medium
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