When the aortic semilunar valve closes and blood bounces off of it, it produces the ________ heart sound that is ultimately related to when the ________.
A. lubb (S1); ventricles relax
B. lubb (S1); atria contract
C. dupp (S2); ventricles relax
D. lubb (S1); ventricles contract
E. dupp (S2); atria relax
Answer: C
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Angina is often felt in the upper left chest and arm because
A) these are the first areas to be injured when a person has a heart attack. B) the pain is "referred" to the corresponding region of the primary sensory cortex. C) muscles in this area work harder during a heart attack and become sore from fatigue. D) the tissues in these regions are damaged or diseased. E) None of the answers are correct.
This GI tract organ stores food temporarily, and continues the mechanical and chemical breakdown of food
A) esophagus B) oral cavity C) small intestine D) stomach
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.
The lower the pH, the greater the number of hydrogen ions released by a chemical into solution
Indicate whether the statement is true or false