Phase 0 of Cardiac Cell Depolarization in the Fast Potentials

question 78

Multiple Choice

Phase 0 of cardiac cell depolarization in the fast potentials is characterized by rapid:

• A) Efflux of Na⁺
• B) Influx of Na⁺
• C) Efflux of Ca⁺⁺
• D) Influx of Ca⁺⁺

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Definitions:

Femur

The longest and strongest bone in the human body, extending from the hip to the knee.

Sternum

is the long flat bone located in the center of the chest, connecting the rib bones and serving as a support for the upper body.

Vertebra

One of the individual bones that stack to form the vertebral column (spine), providing structural support and housing spinal cord pathways.

Left Ribs

Refers specifically to the ribs on the left side of the body, which protect the thoracic cavity and support the respiratory system.