Myocardial Cells Exhibit a Plateau Phase Instead of Quickly Repolarizing

question 52

Multiple Choice

Myocardial cells exhibit a plateau phase instead of quickly repolarizing.This is due to

• A)inward diffusion of calcium through slow Ca²⁺ channels.
• B)inward diffusion of sodium through fast Na⁺ channels.
• C)inward diffusion of potassium through voltage-gated K⁺ channels.
• D)outward pumping of sodium by the Na⁺/K⁺ pump.

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Definitions:

Trichromatic Theory

A theory of color vision that proposes that the eye has three types of receptors with differing sensitivities to different light wavelengths.

Perceive White

The process by which the visual system interprets a spectrum of light that reflects off surfaces without significant absorption, resulting in the perception of white color.

Three Types Of Cones

Refers to the three kinds of cone cells in the human eye that are sensitive to different wavelengths of light, enabling color vision: red, green, and blue cones.

Color Constancy

The ability of the human visual system to perceive colors of objects, under varying lighting conditions, as being constant.