Which is TRUE about typical, resting neurons? O The plasma membrane is most permeable to sodium ions. The concentration of sodium ion is greater inside the cell than outside. O The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions. O The plasma membrane is completely impermeable to sodium ions. O The plasma membrane is completely impermeable to potassium ions.

Which is TRUE about typical, resting neurons? O The plasma membrane is most permeable to sodium ions. The concentration of sodium ion is greater inside the cell than outside. O The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions. O The plasma membrane is completely impermeable to sodium ions. O The plasma membrane is completely impermeable to potassium ions.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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What proteins are responsible for membrane potential in section 1 potassium leak channels opening of potassium channels opening of ligand gated sodium channels Na+/K+ Atpase opening of sodium channels
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Choose all that apply [Na*] + [K'] | + + + + This diagram is a drawing of normal conditions that occur in a neuron's axon (not all details are included). This stage that a living neuron would be in, would show that no positive ions are inside the cell current is traveling down the axon the cell will be at rest once the Na ions enter the cell the cell is at rest Na ions are predominantly outside the cel
Our patient cannot remove potassium from their extracellular fluid. This is known as hyperkalemia. Describehow the two things above, the resting membrane potential and the action potential, would be different in someone with hyperkalemia.
Describe leak ion channels and gated ion channels. Howare they responsible for the permeability of a restingversus a stimulated plasma membrane?
1.25 p Question 22 Which statement below best describes why action potentials travel in only one direction? O The all-or-none principle explains this. O They have a refractory period. O The diameter of the axon explains this. O Only sodium- and potassium-gated channels are found on the axon. O They have myelinated axons. • Previous Next Not saved Submi
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The patient's muscle weakness, dizziness, and nausea are all due to hypokalemia. How does hypokalemia lead to muscle weakness? O hypokalemia leads to hypopolarization which results in fewer action potentials arriving at skeletal muscles O hypokalemia leads to hyperpolarization which results in fewer action potentials arriving at skeletal muscles O hypokalemia leads to hypopolarization which leads to too many action potentials arriving at skeletal muscles O hypokalemia leads to hyperpolarization which results in too many action potentials arriving at skeletal muscles
Under what conditions could the opening of a chloride channel actually depolarize a neuron rather than hyperpolarize it? i. The neuron is resting at -75 mVii. The extracellular chloride concentration is lower than the intracellular chloride concentrationiii. The neuron is close to its threshold of -55 mVa. i onlyb. iii onlyc. i and ii onlyd. ii and iii onlye. i, ii, and iiif. None of these
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Part A When sodium ion channels open, what happens to the cell's membrane potential? O hyperpolarization O repolarization depolarization the cell maintains its resting membrane potential Submit Request Answer Provide Feedback