What is the purpose of the triad?
A. The triad removes acetylcholine from the synaptic cleft.
B. The triad stores sodium.
C. The triad maintains the resting membrane potential.
D. The triad synthesizes ATP.
E. The triad allows for Ca2+ release when a muscle fiber is excited.
Answer: E
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Which send blood to either esophageal arteries or esophageal branches to supply the esophagus with blood?
A. Thoracic aorta B. Bronchial arteries and left gastric artery C. Thoracic aorta and left gastric artery D. Bronchial arteries E. Left gastric artery
What is the advantage of the small diameter of capillaries?
A) It dampens the rise in pressure during ventricular systole. B) It slows blood flow, allowing sufficient time for capillary exchange to occur. C) It absorbs the pressure changes that occur during the cardiac cycle. D) It allows the vessels to overcome the force of gravity without a need for valves. E) It prevents the backflow of blood, improving venous return.
A shallow depression on a bone is termed a
A) fossa.
B) sulcus.
C) facet.
D) fissure.
E) line.
How will breathing rate change with hyperventilation?
A) Breathing rate decreases. B) Breathing rate decreases and becomes shallow. C) Breathing rate fluctuates between rapid and slow. D) Breathing rate becomes rapid.