★ Circulatory / Respiratory Quiz
What is the term for the area at the back of the throat that is a common passageway for both food and air
A. larynx
B. pharynx
C. trachea
D. epiglottis
E. esphagus
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What causes the semilunar valves to open?
A. contraction of the ventricles
B. contraction of the atria
C. stimulation of the SA node
D. backflow of blood in the aorta and pulmonary artery during diastole
E. contraction of the cardiac muscle that makes up the valves
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