What characteristic differentiates cardiac muscle cells from skeletal muscle cells?
A) striations
B) excitability
C) sarcoplasmic reticulum
D) intercalated discs
Correct Answer:
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Q29: Which vessel is guarded by a semilunar
Q30: As a result of the long refractory
Q31: Which of the following is NOT a
Q32: During what phase of the action potential
Q33: What do pacemaker cell action potentials lack?
A)threshold
B)depolarization
C)repolarization
D)plateau
Q35: Which valve is situated between the left
Q36: How do cardiac cells sustain a membrane
Q37: An insufficient mitral valve (bicuspid valve,or left
Q38: Autorhythmicity in the heart is the responsibility
Q39: Which of the following pacemaker cell populations
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