Why Is the Magnitude of Na⁺ Electrochemical Gradient Created by the Na⁺/K⁺

question 55

Multiple Choice

Why is the magnitude of Na⁺ electrochemical gradient created by the Na⁺/K⁺ pump larger than the magnitude of K⁺ electrochemical gradient?

• A) because K⁺ chemical and electrical gradients occur in the same direction whereas Na⁺ electrical and chemical gradients occur in opposite directions
• B) because Na⁺ chemical and electrical gradients occur in the same direction whereas K+ electrical and chemical gradients occur in opposite directions
• C) because Na⁺ is a bigger ion than potassium
• D) because Na⁺ gradient is directed toward the inside of the cell

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Definitions:

Vasoconstriction

The constriction of blood vessels that elevates blood pressure and diminishes blood circulation to specific regions.

Thromboxane

Specific class of physiologically active fatty acid derivatives present in many tissues.

Endothelin

A potent vasoconstrictive peptide produced by vascular endothelial cells that regulates blood vessel tone and blood pressure.

Connective Tissue

Tissue that supports, connects, or separates different types of tissues and organs in the body, characterized by few cells and extensive extracellular matrix.