How many spinal cord enlargements correspond to regions where nerves that
innervate the limbs emerge?
Two
Three
One
Four
Five
~ Two
A bundle of spinal nerves and nerve roots that extend from the end of the spinal
cord, typically at the level of the first or second lumbar vertebra, down t...
BIOS 252: Practice Questions and
Correct Answers
What lever class has the fulcrum situated between the force and the load?
Fourth-class lever
Third-class lever
First-class lever
Fifth-class lever
Second-class lever
✓✓~ First-class lever
Which of the following helps an agonist work?
A fixator
An insertion
An antagonist
Prime mover
A synergist
✓✓~ A synergist
, Which of the following is a prime mover in head flexion?
Deltoid
Sternocleidomastoid
Corrugator supercilii
Masseter
Occipitofrontalis
✓✓~ Sternocleidomastoid
Which element is important in directly triggering contraction?
Calcium (Ca++)
Sodium (Na+)
Potassium (K+)
Chloride (Cl-)
Proteins
✓✓~ Calcium (Ca++)
Thin and thick filaments are organized into functional units called
sarcolemma
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