Glial cells, neuroglia
Neuroglia or glial cells maintain homeostasis, form myelin, and provide support and protection for neurons…
Nerve Cell
Excitatory and inhibitory nerve fibers: summation, frequency of firing
Summation occurs when excitatory impulses add together to reach the threshold to fire a neuron;…
Action potential
Neural impulses occur when a stimulus depolarizes a cell membrane, prompting an action potential which…
Resting potential: electrochemical gradient
The concentration gradient of ions across the membrane and the membrane permeability to each type…
Synaptic activity: transmitter molecules
Synaptic transmission is a chemical activity that is involved in the transmission of the impulse…
Synapse: site of impulse propagation between cells
A synapse is a structure that permits a neuron to pass an electrical or chemical…
Nodes of Ranvier: propagation of nerve impulse along axon
Nodes of Ranvier or myelin-sheath gaps along the axons that contain sodium and potassium ion…
Myelin sheath, Schwann cells, oligodendrocytes, insulation of axon
Oligodendrocytes and Schwann cells are types of neuroglia cells that produce myelin sheath, which acts as insulation…
Axon: structure and function
Axon is a tube-like structure that carries neural signals away from the cell body via…
Dendrites: branched extensions of cell body
Dendrites are branched structures that extend away from the cell body and carry signals toward…