The phase of the cardiac cycle during which each chamber contracts and pushes blood into the next structure is
A) ejection.
B) systole.
C) relaxation.
D) diastole.
E) None of the answers are correct.
B) systole.
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The esophagus
A. has thin walls of connective tissue. B. produces two enzymes that digest proteins. C. has upper and lower sphincters to regulate movement of food. D. has cartilage in its walls to keep it from collapsing. E. extends from the fauces to the stomach.
The glomerular capsule and the glomerulus make up the
A) renal pyramid. B) nephron loop. C) renal corpuscle. D) renal papilla. E) collecting tubule system.
Growth hormones act indirectly to make the epiphyseal plate cartilage grow. What then acts directly to make it grow?
What will be an ideal response?
Cardiac muscle cannot undergo tetanus because its absolute refractory period lasts almost as long as the muscle twitch
Indicate whether the statement is true or false.