Question

Mechanistically, what actually happened to your arms as you walked away from the doorway with your

arms relaxed? Make sure that you describe the sequence of events in order, using the terms alpha motor neuron,
central nervous system, contraction, extrafusal fibers, gravity, intrafusal fibers, sensory neuron, and stretch.
The terms are not listed in the correct sequence!

Answer 1

relaxed, gravity causes your arms to hang down

Step-by-step explanation:

when you walk away from the doorway with your arms relaxed, gravity causes your arms to hang down. The stretch of intrafusal fibers is detected by sensory neurons, which transmit this information to the CNS. The CNS then sends signals through alpha motor neurons to contract the extrafusal muscle fibers, generating tension that counteracts the force of gravity and keeps your arms stable.