Molecular machines that perform specific functions for the cell are:
A) cytosol. B) the cytoskeleton.
C) the plasma membrane. D) organelles.
Answer: D
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The pacemaker of the heart is normally which structure?
a. atrioventricular (AV) node b. sinoatrial (SA) node c. mitral valve d. bundle of His e. left ventricle
The P wave of the ECG represents ________
A) depolarization of the ventricles B) repolarization of the ventricles C) repolarization of the atria D) depolarization of the atria
The apneustic centers of the pons
A) inhibit the pneumotaxic and inspiratory centers. B) provide stimulation to the inspiratory center. C) monitor blood gas levels. D) alter chemoreceptor sensitivity. E) generate the gasp reflex.
Identify the intrinsic muscle that flexes the great toe
A) lumbricals B) flexor digitorum brevis C) abductor digiti minimi D) flexor hallucis brevis E) flexor digiti minimi brevis