Graded muscle contractions ________
A) depend on activation of more and more motor units
B) represent increasing amounts of force generated by a muscle
C) depend on increasing frequency of nerve action potentials to each motor unit
D) all of the above
Answer: D
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In general, the lipids that we refer to as oils have ________
A) long fatty acid chains B) a high water content C) unsaturated fatty acids D) saturated fatty acids
The placenta is formed by ________
A) maternal and fetal tissues B) fetal tissues C) maternal tissues
The large proximal projection on the femur is termed the
A) ramus. B) trochanter. C) tuberosity. D) tubercle. E) condyle.
How is alveolar air different than inspired air?
A. Alveolar air has a higher PN2 than inspired air. B. Alveolar air has a lower PCO2 than inspired air. C. Alveolar air has a higher PH2O than inspired air. D. Alveolar air has a higher PO2 than inspired air.