Why does one continue to breathe heavy after rigorous physical activity has stopped?
A) The kidneys require oxygen to dispose of excess lactic acid.
B) The diaphragm is waiting for its acetylcholine to run out.
C) The lungs can't stop breathing until the heart rate slows down.
D) Myosin heads need more oxygen to fully detach from actin.
E) The body requires more oxygen to restore levels of ATP and creatine phosphate.
E
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An increased respiration rate:
a. increases the carbonic acid in the blood b. decreases the carbonic acid in the blood c. causes the pH of the blood to drop d. both A and C above
The most common type of cartilage is ________ cartilage
A) ligamentous B) hyaline C) elastic D) fibrous E) osseous
Where in the body would you find low oxygen levels causing vasoconstriction and high levels causing vasodilation?
A) kidney B) lungs C) liver D) heart
The superior portion of the heart where major blood vessels enter and exit is the
A) base. B) apex. C) inferior border. D) right border. E) left border.