Which of the Following Delays the Electrical Impulse for Muscle

question 4

Multiple Choice

Which of the following delays the electrical impulse for muscle contraction, giving the atria time to contract completely and fill the ventricles with blood?

• A) AV node
• B) SA node
• C) Purkinje fibers
• D) Bundle of His
• E) Bundle branches

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Definitions:

ATP Synthase

An enzyme complex that produces ATP from ADP and inorganic phosphate during cellular respiration and photosynthesis.

Hydrogen Ions

Positively charged ions (H+) formed when hydrogen atoms lose their electrons, significantly involved in acid-base chemistry.

Fermentation

A metabolic process that produces chemical changes in organic substrates through the action of enzymes, commonly used in the making of beer, wine, and bread.

Aerobic Respiration

A metabolic process in cells that uses oxygen to convert glucose into energy, producing water and carbon dioxide as byproducts.