PATHOLOGY MCQ
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Neurotransmitter receptors
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Voltage-gated ion channels
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The sodium-potassium pump
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Ligand-gated ion channels
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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 resting potential is maintained by a number of transmembrane proteins, some of which involve active transport and others rely on facilitated diffusion. The Sodium Potassium Pump works by active transport i.e. it requires energy to do work this is provided by Adenosine Triphosphate (ATP).
Detailed explanation-3: -The Sodium potassium pump and the K+ leakage channels are responsible for establishing and maintaining the resting membrane potential.