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Worksheetsmuscle contraction quiz
Total questions: 25
Worksheet time: 13mins
A neurotransmitter that stimulates skeletal muscles
acetylcholine (Ach)
ATP
cross bridges
neuromuscular junction
The only energy source that can be used to directly power muscle contraction is
acetylcholine (Ach)
ATP
cross bridges
neuromuscular junction
What is the function of Calcium during a skeletal muscle contraction?
connects to H zone to close binding sites
connects to actin to open binding sites
connects to myofibril to form a cross bridge
connects to myosin to open binding sites
Which of the following occur when ATP binds to the myosin head?
Myosin head change to low energy configuration
Myosin head undergoes power stroke
Myosin head detach from actin
Myosin head forms cross bridge
The Sliding Filament Theory states that
contraction occurs due to the shortening of thick filaments
contraction occurs due to the shortening of thin filaments
contraction occurs due to the sliding of thin filaments past thick filaments
contraction occurs due to the "accordian-like" folding of thick and thin filaments
The movement shown is a person moving his leg outward. This movement is known as:
abduction
adduction
rotation
flexion
Name this movement
adduction
abduction
flexion
extension
__________ is attached to the Z line?
myosin
actin
thick filament
troponin
What is the contractile unit formed from Z line to Z line?
Sarcomere
T Tubule
Sarcoplasmic reticulum
Fascicle
The H zone changes size during a muscle contraction.
True
False
