PNB 2264 LAB QUIZ 6 EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
What bands shorten during contraction? - ANS I band and H band as the Z line pulls toward
the M line
neuromuscular junction - ANS point of contact between a motor neuron and a skeletal
muscle cell
where are motor neurons activated? - ANS spinal cord gray matter (ventral)
threshold - ANS the minimal amount of stimulus required for motor neuron activation
all-or-none response - ANS a neuron's reaction of either firing (with a full-strength response)
or not firing.
recruitment - ANS when several motor units are activated and the muscle contraction grows
in strength
myelin sheet of motor neuron - ANS propagate action potentials fast and at long distances
Acetylcholine - ANS A neurotransmitter that triggers muscle contraction
QUESTIONS AND ANSWERS 2026
VERIFIED.
What bands shorten during contraction? - ANS I band and H band as the Z line pulls toward
the M line
neuromuscular junction - ANS point of contact between a motor neuron and a skeletal
muscle cell
where are motor neurons activated? - ANS spinal cord gray matter (ventral)
threshold - ANS the minimal amount of stimulus required for motor neuron activation
all-or-none response - ANS a neuron's reaction of either firing (with a full-strength response)
or not firing.
recruitment - ANS when several motor units are activated and the muscle contraction grows
in strength
myelin sheet of motor neuron - ANS propagate action potentials fast and at long distances
Acetylcholine - ANS A neurotransmitter that triggers muscle contraction
