Question

what is node of ranvier? explain​

Answer 1

nodes of ranvier. small gaps of exposed axon, between the segments of myelin sheath, where action potentials are transmitted. sensory neuron. a neuron that picks up stimuli from the internal or external environment and converts each stimulus into a nerve impulseThe nodes of Ranvier contain Na+/K+ ATPases, Na+/Ca2+ exchangers and high density of voltage-gated Na+ channels that generate action potentials. A sodium channel consists of a pore-forming α subunit and two accessory β subunits, which anchor the channel to extra-cellular and intra-cellular components.The myelin allows the electrical impulse to move quickly down the axon. The nodes of Ranvier allow for ions to diffuse in and out of the neuron, propagating the electrical signal down the axon. Since the nodes are spaced out, they allow for saltatory conduction, where the signal rapidly jumps from node to node.

Answer 2

Answer:

It is a gap in the myelin sheath of a nerve, between adjacent Schwann cells.

The myelin allows the electrical impulse to move quickly down the axon. The nodes of Ranvier allow for ions to diffuse in and out of the neuron, propagating the electrical signal down the axon. Since the nodes are spaced out, they allow for saltatory conduction, where the signal rapidly jumps from node to node.