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How would the loss of acetylcholinesterase from the motor end plate affect
skeletal muscle?
A. It would cause spastic paralysis (muscles are contracted and unable to
relax).
B. It would produce muscle weakness.
C. It would make the muscles less excitable.
D. It would have little effect on skeletal muscles.
E. It would cause flaccid paralysis (muscles are relaxed and unable to
contract). - ✔✔A. It would cause spastic paralysis (muscles are contracted
and unable to relax).
1
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,Damage to which of the following muscles would interfere most with the
ability to breathe?
A. intercostals
B. platysma
C. rectus abdominis
D. digastric
E. pterygoid - ✔✔A. intercostals
Muscles visible at the body surface are often called
A. intrinsic.
B. profundus.
C. rectus.
D. internus.
E. superficialis. - ✔✔E. superficialis.
2
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, The most common lever systems in the body are those that have the
applied force between the fulcrum and the load. These are called ________
levers.
A. first-class
B. second-class
C. third-class
D. fourth-class
E. fifth-class - ✔✔C. third-class
The type of muscle fiber that is most resistant to fatigue is the ________
fiber.
A. high-density
B. anaerobic
C. intermediate
D. slow
E. fast - ✔✔D. slow
3
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