What percentage of the O2 in the blood is dissolved?
a. 0%
b. 0.5%
c. 1.5%
d. 5%
e. 15%
c
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Which muscle is the prime mover for the "up" part of a sit-up?
A. Serratus posterior B. Erector spinae C. Trapezius D. Rectus abdominis E. Rectus femoris
Phospholipids are critical structures in cell membranes and are therefore enzymes.
Answer the following statement true (T) or false (F)
Every neuron has
A. myelin. B. a neurilemma. C. many axons. D. a cell body.
Answer the following statements true (T) or false (F)
1. Skeletal muscle cells contain more than one nucleus. 2. All muscles specialize in contraction or shortening. 3. Bursae and tendon sheaths have the same function. 4. The pull of gravity assists the muscles in maintaining body posture. 5. When stimulated, the entire muscle follows the all-or-none law.