Class 6 Flashcards
- Which of these muscle shapes generate the fastest transfer of force to the bone (lever) and the greatest amount of force to the bone (lever), respectively.
a. parallel; convergent
b. multipennate; fusiform
c. fusiform; multipennate
d. unipennate; multipennate
c
Which labels go with the hamstring muscle; physiological cross-sectional area; anatomical cross-sectional area; and rectus femoris muscle, respectively?
a. 4, 1, 2, 3
b. 4, 2, 1, 3
c. 3, 1, 2, 4
d. 3, 2, 1, 4
d
This stained muscle sample shows which types of muscle fibers in highest to lowest numbers, respectively?
a. ST, FTa, FTb
b. ST, FTb, FTa
c. FTb, FTa, ST
d. FTa, FTb, ST
d
A large motor unit is one that _____.
a. has a large diameter (myelinated) motor neuron
b. has a long motor neuron running from the spinal cord to the feet
c. innervates many muscle fibers (of the same type) throughout the whole muscle
d. innervates many muscle fibers (of different types) throughout the whole muscle
c
Type I (ST) muscle fibers tend to be _____ in size (diameter) than Type II (FT) muscle fibers.
a. smaller
b. larger
c. similar
a
This graph showing muscle fiber type activation, sends a strong message that _____ training should be continued for a lifetime.
a. cardio
b. core
c. weight
d. balance
c
A muscle which provides the greatest force during a given movement is called a(n) _____.
a. agonist
b. synergist
c. stabilizer
d. antagonist
a
A muscle that often substitutes when an agonist is underactive is a(n) _____.
a. synergist
b. stabilizer
c. antagonist
d. all the above
a
This illustration provides an example of 4 exercises and 4 ______ muscles.
a. agonist
b. synergist
c. stabilizer
d. antagonist
b
This illustration provides an example of 4 exercises and 4 ______ muscles.
a. agonist
b. synergist
c. stabilizer
d. antagonist
c
This illustration provides an example of 4 exercises and 4 ______ muscles.
a. agonist
b. synergist
c. stabilizer
d. antagonist
d
This illustration provides an example of 4 exercises and 4 ______ muscles.
a. agonist
b. synergist
c. stabilizer
d. antagonist
a
Which statements are true?
a. activated skeletal muscles can pull on a bone but can never push on a bone
b. ST motor units activate immediately at the lowest effort level; the FTa motor units activate at about 50% to 60% of maximal effort; and the FTb motor units activate at about 70% of maximal effort
both are true
Which statements are true?
a. connective tissue is what transfers the pulling force from a muscle to the bone
b. moving correctly helps to turn on and train the right muscles; training the right muscles helps a person to move correctly
both are true
