Which of the Following Does NOT Correctly Describe Cardiac Muscle Cells

question 12

Multiple Choice

Which of the following does NOT correctly describe cardiac muscle cells?

• A)They are arranged in layers surrounding hollow cavities in the heart.
• B)They are much shorter than skeletal muscle fibers,and generally have a single nucleus.
• C)Their membranes are depolarized initially by the influx of sodium ions.
• D)They depolarize prior to contraction.
• E)They can contract in the absence of external calcium.

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Definitions:

Positively Charged

Carrying more protons than electrons, which confers a net positive electric charge to an atom, molecule, or particle.

Mineral Ions

Inorganic nutrients that play crucial roles in cellular processes and maintaining the body's acid-base balance and osmotic pressure, including ions like calcium, potassium, and magnesium.

Pericycle

Of a root, outer layer of the vascular cylinder; a thin layer of cells that retain the ability to divide and differentiate.

Vascular Tissue

The specialized tissue in plants that conducts water, nutrients, and energy throughout the plant body.