What happens to membrane potential when the brain is deprived of oxygen?

Question 5: When the brain is deprived of oxygen, the mitochondria within the neurons cease to produce ATP. As a result, the resting membrane potential will not exist and the brain will not function.

What happens to the resting membrane potential of Na +/ K+ Atpase is inhibited?

Inhibition of this pump, therefore, causes cellular depolarization resulting not only from changes in Na+ and K+ concentration gradients, but also from the loss of an electrogenic component of the resting membrane potential.

What happens to the resting membrane potential when the extracellular Na+ concentration is decreased?

As the concentration of sodium in the extracellular solution is reduced, the action potentials become smaller.

Does the resting membrane potential increase or decrease if we decrease the concentrations of extracellular K +?

If the extracellular potassium concentration surrounding a myocyte increases, then the potassium gradient accross the cell membrane decreases, and therefore the resting membrane potential will become more positive. Similarly, if extracellular potassium decreases, the resting membrane potential will be more negative.

When the brain is deprived of oxygen the mitochondria stop making ATP what will happen to the resting membrane potential?

The neuron is filled with negatively charged molecules. such as proteins that do not transverse the cell membrane through channels the way that ions do. When the brain is deprived of oxygen, the mitochondria within the neurons cease to produce ATP. What effect would this have on the membrane potential and why?

When the brain is deprived of oxygen the mitochondria within the neurons cease to produce ATP?

relative ability of an electrical charge to migrate from one point to another; rep by g and in units of siemens. voltage across the neuronal membrane, represented by Vm. thin glass tube with an extremely fine tip, which will penetrate the membrane of a neuron with minimal damage.

What is the role of the Na +/ K+ ATPase pump in regards to the resting membrane potential quizlet?

Na+-K+ ATPase pump – This pump pushes only 2K+ into the cell for every 3Na+ it pumps OUT of the cell. Therefore, its activity results in a net loss of positive charges within the cell. Na+ channels are closed when the plasma membrane is at rest.

What affects Na +/ K+ ATPase activity?

Renal Na+,K+-ATPase activity is bidirectionally regulated by natriuretic and antinatriuretic hormones, and a shift in the balance between these forces may lead to salt retention and hypertension. Dopamine plays a key role in this interactive regulation.

When Na+ channels open what happens to the Na+ ions?

The open Na+ channels allow Na+ ions to passively diffuse into the axon. This causes a localized depolarization in the axon from -70 mv to +55 mv.

What happens to resting membrane potential in hyperkalemia?

In hyperkalemia, the resting membrane potential is decreased, and the membrane becomes partially depolarized. Initially, this increases membrane excitability. However, with prolonged depolarization, the cell membrane will become more refractory and less likely to fully depolarize.

What happens to action potential when extracellular potassium increases?

During cardiac disturbances such as ischemia and hyperkalemia, the extracellular potassium ion concentration is elevated. This in turn changes the resting transmembrane potential and affects the excitability of cardiac tissue.