MEDICAL PHYSIOLOGY

Detailed explanation-1: -A nerve impulse is the electric signals that pass along the dendrites to generate a nerve impulse or an action potential. An action potential is due to the movement of ions in and out of the cell. It specifically involves sodium and potassium ions.

Detailed explanation-2: -Neurons conduct electrical impulses by using the Action Potential. This phenomenon is generated through the flow of positively charged ions across the neuronal membrane.

Detailed explanation-3: -Ions that are important in the formation of a nerve impulse include sodium (Na+) and potassium (K+). The sodium-potassium pump maintains the resting potential of a neuron.

Detailed explanation-4: -Ions enter and exit the cell through specific protein channels in the cell’s membrane. The channels “open” or “close” in response to neurotransmitters or to changes in the cell’s membrane potential. The resulting redistribution of electric charge may alter the voltage difference across the membrane.