★ Health Systems Quiz
requires patients to get referrals to see specialists
A. HMO
B. PPO
C. BOTH
D. NONE
Select your answer:
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Body Fluids › ViewDoctors use stethoscope to hear the sound; produced during each cardiac cycle. The second sound is heard when
a) AV node receives signal from SA node
b) AV valves open up
c) Ventricular walls vibrate due to gushing of blood from atria
d) Semilunar valves close down after the blood flows into vessels from ventricles
Circulatory / Respiratory › View
If the trachea and esophagus were completely separate in humans, which of the following would NOT be needed?
A. swallowing
B. a nose
C. an epiglottis
D. a diaphragm
E. all are correct