The heart pumps about ____ liters of blood a day and contracts about _____ times in a
lifetime.
A) 3,000 liters; 2 billion B) 1,200 liters; 2 billion
C) 7,000 liters; 2.5 billion D) 1,000 liters; 1 billion
C
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Which is nota bursa associated with the shoulder joint?
A. subacromial B. subdeltoid C. subcoracoid D. subscapular E. All are bursae associated with the shoulder joint.
A myelin sheath is composed primarily of __________.
A. lipids B. carbohydrates C. glycoproteins D. proteins E. polysaccharides
Answer the following statements true (T) or false (F)
1. When the red blood cells break apart, their components are removed from the blood by the kidneys. 2. Granular leukocytes may have a circulating lifespan of up to 6 months. 3. Nongranular leukocytes have a circulating lifespan of just a few days. 4. The shape of the red blood cell helps reduce its surface area. 5. The red blood cells have no nucleus.
In which of the following would the motor units have the fewest muscle fibers?
A) muscle that control the eyes B) calf muscles C) muscles of the neck D) postural muscles of the back E) thigh muscles