Tendinous intersections divide the ________ into segments that are externally visible on the abdomen of a well-muscled person.
A. vastus lateralis
B. transverse abdominal
C. rectus abdominis
D. serratus anterior
E. quadriceps femoris
Answer: C
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Depolarization from the resting potential of -70 mV proceeds slowly until it reaches a critical level known as ____
a. polarizing action b. electrical action c. depolarizing potential d. active potential e. threshold potential
When a motor neuron of a particular motor unit is activated, all of the muscle fibers it innervates are stimulated to contract simultaneously.
Answer the following statement true (T) or false (F)
Which of the following is an accurate comparison of skeletal muscle to smooth muscle?
A. Smooth muscle contracts more slowly but relaxes more rapidly. B. Smooth muscle depends on a nerve fiber to supply the calcium needed for contraction. C. Smooth muscle contracts and relaxes more slowly. D. Smooth muscle consumes more ATP to maintain a given level of muscle tension. E. Smooth muscle contracts more rapidly but relaxes more slowly.