WorksheetsSliding Filament Theory Quiz
Total questions: 12
Worksheet time: 6mins
The motor unit consists of muscle fibers and a ________
Motor neuron
Synapse
Sarcolemma
Sarcoplasmic reticulum
What neurotransmitter is needed to initiate a muscle contraction?
Acetylcholine
Adrenaline
Dopamine
Serotonin
What substance causes the actin to change shape?
Sodium
Calcium
Chloride
Potassium
How does myosin and actin interact with each other?
They do not interact
They slide past each other
They repel each other
Cross-bridges form
What substance provides the energy for muscle contraction?
ATP
Glucose
Lactic acid
Glycogen
Where is calcium released from?
Sarcolemma
Sarcoplasmic reticulum
Motor neuron
Transverse tubule
What is the role of ATP in muscle contraction?
It provides the energy for the power stroke of the myosin cross bridge.
It acts as a neurotransmitter to initiate muscle contraction.
It is the main component of the sarcolemma.
It is responsible for the release of calcium ions.
What happens to the muscle when the concentration of calcium ions decreases?
The muscle contracts more forcefully.
The muscle relaxes.
The muscle becomes paralyzed.
The muscle begins to twitch uncontrollably.
What is the role of the sarcoplasmic reticulum in muscle contraction?
It provides the energy for muscle contraction.
It is the site where actin and myosin interact.
It stores and releases calcium ions.
It is the site where acetylcholine is released.
What is the role of the Tropomyosin in muscle contraction?
It blocks the myosin binding sites on actin.
It provides the energy for muscle contraction.
It is the site where acetylcholine is released.
It is responsible for the release of calcium ions.
What happens to the muscle when the concentration of ATP decreases?
The muscle contracts more forcefully.
The muscle relaxes.
The muscle becomes paralyzed.
The muscle begins to fatigue.
What is the role of the Troponin in muscle contraction?
It provides the energy for muscle contraction.
It binds to calcium ions to initiate muscle contraction.
It is the main component of the sarcolemma.
It is responsible for the release of calcium ions.
