Which of the Following Does Not Characterize Pacemaker Cells

question 146

Multiple Choice

Which of the following does not characterize pacemaker cells?

• A) They are modified cardiac muscle cells.
• B) Their action potentials rise rapidly.
• C) They can initiate action potentials without stimulation from the nervous system.
• D) They fire action potentials and stimulate neighboring cells to contract.
• E) Their action potentials are broader than those of neurons.

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Definitions:

Dorsiflexion

The action of lifting the foot upwards towards the shin.

Eversion

Turning outward.

Inversion

Turning inward.

Plantar Flexion

The movement that decreases the angle between the sole of the foot and the back of the leg, as in pointing the toes.