Answer the following statements true (T) or false (F)
1. An ECG is a graphic representation of the heart’s electrical activity.
2. An unusual P wave tracing on an ECG would indicate a problem with ventricular depolarization.
3. The QRS complex on an ECG measures the repolarization of the ventricles.
4. The T wave tracing measures atrial repolarization.
5. Depolarization occurs just before contraction.
1. TRUE
2. FALSE
3. FALSE
4. FALSE
5. TRUE
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The reabsorption of both sodium and potassium is carefully regulated
Indicate whether this statement is true or false.
Myelin is important in ________
A) allowing electrical signals to be transferred from one axon to another adjacent axon B) insulating axons and increasing the conduction velocity of action potentials C) absorbing damaged tissue or invading organisms D) maintaining the ionic balance in the environment surrounding the axon
The monoamine that has functions related to sleep, appetite, cognition, and mood is
A. epinephrine. B. dopamine. C. acetylcholine. D. norepinephrine. E. serotonin.
In _____, the new cells are the same type as those that were destroyed
A. necrosis B. regeneration C. replacement