Which of the following criteria must be met for the heart to function efficiently?
a. Excitation and contraction of each heart chamber should be coordinated to ensure efficient pumping.
b. The atria should be excited and contract before the onset of ventricular contraction to ensure that ventricular filling is complete.
c. The right side of the heart should contract first to ensure that oxygenated blood is delivered to the heart before the left side contracts.
d. Both a and b
e. Both b and c
D
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The internal anatomy of the brain has which structure?
A. White matter only B. White matter surrounded by gray matter C. Gray matter only D. Gray matter surrounded by white matter
Rapid impulse conduction from "node" to "node" is called
A) spatial propagation. B) saltatory propagation. C) divergent propagation. D) synaptic transmission. E) continuous propagation.
The ____________________ is the volume of blood in the ventricle when ejection is complete
Fill in the blank(s) with correct word
Ligaments attach
A. muscle to muscle. B. nerve to bone. C. bone to bone. D. nerve to muscle. E. muscle to bone.