The central chemoreceptors that influence the control of breathing respond to changes in the

A. PCO2 and H+ of cerebral spinal fluid.
B. H+ of mixed venous blood.
C. PCO2 and H+ of mixed venous blood.
D. PO2, pH, and PCO2 of arterial blood.


Answer: A

Health & Biomechanics

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Urine is produced by ________.

Fill in the blank(s) with the appropriate word(s).

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With throat injuries it is extremely important to:

A) immobilize the neck. B) maintain an airway. C) keep the victim in a seated position. D) treat for shock.

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Indicate whether the statement is true or false

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Answer the following statement(s) true (T) or false (F)

1. If you have osteoporosis, you should not do back-strengthening exercises due to increased risk of compression fractures of the spine. 2. Physical inactivity increases the risk of osteoporosis. 3. Bone mass attained early in life is the most important determinant of lifelong skeletal health. 4. Strength training exercises performed on the feet are more effective for prevention of osteoporosis than machine-based exercises performed in a seated position. 5. During hot, humid weather, it is recommended to weigh yourself before and after exercise.

Health & Biomechanics