PHYSIOLOGY
NEUROTRANSMISSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
maintain proper ionic concentration gradients across the neuron membrane
|
|
|
generate the nerve impulse when the neuron is stimulated
|
|
|
)transmit the nerve impulse across the synaptic cleft between neurons
|
|
|
provide a source of Na+ and K+ by splitting NaCl and other appropriate molecules
|
Detailed explanation-1: -[3][4] The Na+K+-ATPase pump helps to maintain osmotic equilibrium and membrane potential in cells. The sodium and potassium move against the concentration gradients. The Na+ K+-ATPase pump maintains the gradient of a higher concentration of sodium extracellularly and a higher level of potassium intracellularly.
Detailed explanation-2: -The Na+-K+ pump actively transports both sodium and potassium ions across the membrane to compensate for their constant leakage.
Detailed explanation-3: -The sodium-potassium pump moves three sodium ions out of the cell for every two potassium ions it moves into the cell continuously. It, therefore, maintains the large potassium ion gradient across the membrane, which in turn provided the basis for resting membrane potential.