Physio Lab Quiz 3 Question and
answers correctly solved 2025
Which of the following terms are NOT used interchangeably?
in vivo - in the body/ the living
muscle tension - muscle force
motor unit - motor neuron
muscle cell - muscle fiber - correct answer motor unit - motor neuron
Which of the following is NOT a phase of a muscle twitch?
contraction phase
shortening phase
latent period
relaxation phase - correct answer shortening phase
Where does the acetylcholine that stimulates muscle contraction bind? -
correct answer receptors in the motor end plate
When acetylcholine binds to its receptors, it results in __________. - correct
answer the end plate potential, a graded depolarization, and a change in ion
permeability
Which of the following occurs during the latent period of muscle contraction?
Acetylcholine is released at the axon terminal.
, An action potential is generated.
Acetylcholine is released at the axon terminal and an action potential is
generated.
Calcium is released from the sarcoplasmic reticulum. - correct answer
Calcium is released from the sarcoplasmic reticulum.
As the stimulus voltage was increased in this activity, which of the following
occurred?
The muscle force generated increased.
The muscle force generated decreased.
The latent period increased in length.
The latent period decreased in length. - correct answer The muscle force
generated increased.
Which of the following describes the relaxation phase?
The sarcomeres are decreasing in length, and the force generated increases.
The sarcomeres are increasing in length, and the force generated decreases.
The sarcomeres are decreasing in length, and the force generated decreases.
The sarcomeres are increasing in length, and the force generated increases. -
correct answer The sarcomeres are increasing in length, and the force
generated decreases.
Which of the following can trigger a muscle twitch?
release of acetylcholine or electrical stimulation
release of acetylcholine or release of calcium from the sarcolemma
answers correctly solved 2025
Which of the following terms are NOT used interchangeably?
in vivo - in the body/ the living
muscle tension - muscle force
motor unit - motor neuron
muscle cell - muscle fiber - correct answer motor unit - motor neuron
Which of the following is NOT a phase of a muscle twitch?
contraction phase
shortening phase
latent period
relaxation phase - correct answer shortening phase
Where does the acetylcholine that stimulates muscle contraction bind? -
correct answer receptors in the motor end plate
When acetylcholine binds to its receptors, it results in __________. - correct
answer the end plate potential, a graded depolarization, and a change in ion
permeability
Which of the following occurs during the latent period of muscle contraction?
Acetylcholine is released at the axon terminal.
, An action potential is generated.
Acetylcholine is released at the axon terminal and an action potential is
generated.
Calcium is released from the sarcoplasmic reticulum. - correct answer
Calcium is released from the sarcoplasmic reticulum.
As the stimulus voltage was increased in this activity, which of the following
occurred?
The muscle force generated increased.
The muscle force generated decreased.
The latent period increased in length.
The latent period decreased in length. - correct answer The muscle force
generated increased.
Which of the following describes the relaxation phase?
The sarcomeres are decreasing in length, and the force generated increases.
The sarcomeres are increasing in length, and the force generated decreases.
The sarcomeres are decreasing in length, and the force generated decreases.
The sarcomeres are increasing in length, and the force generated increases. -
correct answer The sarcomeres are increasing in length, and the force
generated decreases.
Which of the following can trigger a muscle twitch?
release of acetylcholine or electrical stimulation
release of acetylcholine or release of calcium from the sarcolemma
