Neuromuscular Function
The neuromuscular junction is the connection between these two structures.
What is a motor neuron and a muscle fiber?
These two protein filaments slide past each other during muscle contraction.
What are actin and myosin?
This muscle fiber type is best for endurance activities.
What is slow twitch?
This type of contraction occurs when the muscle shortens.
What is a concentric contraction?
What does D.O.M.S stand for?
What is delayed onset muscle soreness?
Actin is the ...
1. Thin Filament within a Muscle Fibre
2. Thick Filament within a Muscle Fibre
1. Thin Filament within a Muscle Fibre
This part of the myosin filament attaches to actin to form a cross-bridge.
What is the Myosin Head?
Fast twitch fibers are best suited for these types of activities.
What are powerful or explosive movements?
This contraction occurs when the muscle lengthens while still producing force.
What is an eccentric contraction?
DOMS usually occurs how many hours after exercise?
What is 12–72 hours?
One neuron and all the skeletal muscle cells it stimulates is the ____ ___.
Motor Unit
ATP is required for this step of the sliding filament process.
What is detaching the myosin head from actin?
Which fiber type relies more on aerobic metabolism?
What is slow twitch?
Holding a plank is an example of this type of contraction.
What is an isometric contraction?
DOMS is most commonly associated with this type of muscle contraction.
What is an eccentric contraction?
Muscle fatigue sets in due to the non-availability of
ATP
Explain what happens to the sarcomere during muscle contraction.
What is the sarcomere shortens as actin slides over myosin?
Which fiber type fatigues more quickly?
What is fast twitch?
During the lowering phase of a bicep curl, the biceps are performing this type of contraction.
What is an eccentric contraction?
True or False: DOMS is caused by lactic acid buildup.
False
What is the specific neurotransmitter that stimulates the muscle contraction?
Acetylcholine
What would happen to muscle contraction if calcium ions were not released?
What is muscle contraction would not occur?
Explain why a marathon runner would have a higher percentage of slow twitch fibers than a sprinter.
What is marathon running requires endurance and aerobic energy over long periods of time?
Why are eccentric contractions more likely to cause muscle soreness than concentric contractions?
What is they create more muscle damage due to greater tension while the muscle lengthens?
What is happening to muscle fibers that causes DOMS?
What is microscopic muscle damage / microtears?