Which of the following is the electrical impulse that initiates a chain reaction resulting in contraction?
A. Repolarization
B. Deflection
C. Depolarization
D. Artifact
E. Polarization
C. Depolarization
Depolarization is the electrical impulse that starts a chain reaction resulting in contraction of the heart.
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What causes fusion beats?
A) Polarization of the ventricle by a sinus impulse that coincides with depolarization by a premature ventricular impulse B) Simultaneous depolarization of the ventricle by a sinus impulse and a premature ventricular impulse C) Depolarization of the ventricle by a sinus impulse that coincides with polarization by a premature ventricular impulse D) Simultaneous polarization of the ventricle by a sinus impulse and a premature ventricular impulse
Examination of stained smears is the best way to identify nematode (roundworm) parasites.
Answer the following statement true (T) or false (F)