Muscle Physiology Quiz

What is the term for where the muscle is attached to a movable bone?

• Origin

• Insertion

• Fixator

• Antagonist

Which type of muscle is most responsible for producing a certain movement?

• Antagonist

• Synergist

• Prime mover

• Fixator

What is the role of an antagonist muscle?

• To stabilize a joint

• To oppose or reverse a movement

• To immobilize the origin bone

• To produce a movement

What is the function of a fixator muscle?

• To help the prime mover

• To immobilize the muscle's origin bone

• To contract muscle fibers

• To surround each fascicle

What is the contractile unit of the muscle that makes up myofibrils?

• Myofilaments

• Sarcomeres

• Muscle fibers

• Fascicles

What is an action potential?

• A small change in membrane potential that spreads slowly

• A large change in membrane potential that spreads rapidly over long distances

• A change in membrane potential that does not spread

• A change in membrane potential that spreads only within the cell

Where does the neuromuscular junction occur?

• Between two muscle fibers

• Where the axon terminals of the motor neuron meet the muscle fiber

• Between two neurons

• At the center of a muscle fiber

What is a motor unit?

• A single muscle fiber

• A group of muscle fibers stimulated by the same motor neuron

• A single neuron

• A group of neurons stimulating one muscle fiber

What is a twitch in muscle physiology?

• A prolonged muscle contraction

• The response of a muscle to a single stimulation causing fibers to contract and relax

• A continuous muscle contraction

• The response of a muscle to multiple stimulations

What is muscle fatigue?

• The increase in ability of a muscle to generate force

• The decline in ability of a muscle to generate force

• The constant ability of a muscle to generate force

• The ability of a muscle to generate force without rest

Tags

NGSS.HS-LS2-3