Physio: Chp. 12 Quiz Questions and
answers rated A+ 2025
Stretching the muscle spindle causes
a) reflex inhibition of the muscle.
b) stretching of the tendon.
c) reflex contraction of the muscle.
d) activation of antagonistic muscles. - correct answer c) reflex contraction of
the muscle.
After a neural signal, sodium flows into a muscle fiber and produces a
depolarization called an end-plate potential (EPP) that is similar in many ways
to the excitatory postsynaptic potentials (EPSPs). How is it different?
a) End-plate potentials can sum together.
b) Hormones can also cause muscle contraction.
c) End-plate potentials are excitatory.
d) End-plate potentials normally have enough amplitude to contract the
muscle. - correct answer d) End-plate potentials normally have enough
amplitude to contract the muscle.
Which of the following is/are TRUE regarding Golgi tendon organs?
a) They provide information on muscle tension to the CNS.
b) They are found at the junction between ligaments and bone.
c) They are free nerve endings that wind between collagen fibers.
, d) Their stretch leads to activation of muscles.
e) Both A and C. - correct answer e) Both A and C
All subclasses of nicotinic cholinergic receptors open channels that let sodium
and potassium ions pass. What does this mean for the effects of these
receptors?
a) inhibitory; driving force of K+ overcomes Na+
b) excitatory; driving force of K+ overcomes Na+
c) inhibitory; driving force of Na+ overcomes K+
d) excitatory; driving force of Na+ overcomes K+ - correct answer d)
excitatory; driving force of Na+ overcomes K+
Which of the following is/are TRUE regarding muscle spindles?
a) They send information about muscle length to the CNS.
b) They are innervated by gamma motor neurons.
c) They contain sensor neurons.
d) All of the above. - correct answer d) all of the above
The somatic motor neurons that innervate skeletal muscle fibers are called
a) alpha motor neurons.
b) gamma motor neurons.
c) intrafusal fibers.
d) extrafusal fibers. - correct answer a) alpha motor neurons.
answers rated A+ 2025
Stretching the muscle spindle causes
a) reflex inhibition of the muscle.
b) stretching of the tendon.
c) reflex contraction of the muscle.
d) activation of antagonistic muscles. - correct answer c) reflex contraction of
the muscle.
After a neural signal, sodium flows into a muscle fiber and produces a
depolarization called an end-plate potential (EPP) that is similar in many ways
to the excitatory postsynaptic potentials (EPSPs). How is it different?
a) End-plate potentials can sum together.
b) Hormones can also cause muscle contraction.
c) End-plate potentials are excitatory.
d) End-plate potentials normally have enough amplitude to contract the
muscle. - correct answer d) End-plate potentials normally have enough
amplitude to contract the muscle.
Which of the following is/are TRUE regarding Golgi tendon organs?
a) They provide information on muscle tension to the CNS.
b) They are found at the junction between ligaments and bone.
c) They are free nerve endings that wind between collagen fibers.
, d) Their stretch leads to activation of muscles.
e) Both A and C. - correct answer e) Both A and C
All subclasses of nicotinic cholinergic receptors open channels that let sodium
and potassium ions pass. What does this mean for the effects of these
receptors?
a) inhibitory; driving force of K+ overcomes Na+
b) excitatory; driving force of K+ overcomes Na+
c) inhibitory; driving force of Na+ overcomes K+
d) excitatory; driving force of Na+ overcomes K+ - correct answer d)
excitatory; driving force of Na+ overcomes K+
Which of the following is/are TRUE regarding muscle spindles?
a) They send information about muscle length to the CNS.
b) They are innervated by gamma motor neurons.
c) They contain sensor neurons.
d) All of the above. - correct answer d) all of the above
The somatic motor neurons that innervate skeletal muscle fibers are called
a) alpha motor neurons.
b) gamma motor neurons.
c) intrafusal fibers.
d) extrafusal fibers. - correct answer a) alpha motor neurons.
