Question

In: Anatomy and Physiology

Based on the ion concentrations provided in the table below, which of the following would result...

Based on the ion concentrations provided in the table below, which of the following would result in an EPSP? Select all that apply.

Ion Intracellular fluid Extracellular fluid
[Na+] 15mM 140mM
[K+] 130mM 4mM
[Cl-] 5mM 120mM
[Ca2+] <0.001mM 1.2mM

A) Sodium channels open

B) Potassium channels open

C) Chloride channels open

D) Calcium channels open

Solutions

Expert Solution

a) Sodium channels open

d) calcium channels open

Explanation: Opening of sodium channels result in influx of positive charge Na+ ion from their higher extracellular concentration into the lower intracllular concentration leading to decrease in negative potential of the membrane. (EPSP).

Opening of chloride channels result in influx of negative charge Cl- ion from their higher extracellular concentration into the lower intracellular concentration leading to increase in the negative potential of the membrane. (IPSP)

Opening of calcium channels result in influx of positive charge Ca++ ion from their higher extracellular concentration into the lower intracllular concentration leading to decrease in negative potential of the membrane. (EPSP).

Opening of potassium channels result in efflux of positive charge K+ ion from their higher intracellular concentration into the lower extracllular concentration leading to increase in negative potential of the membrane.(IPSP)

Sydney Mullin answered 11 months ago
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