Place the following descriptions into the correct order to represent the sequenc
ID: 47618 • Letter: P
Question
Place the following descriptions into the correct order to represent the sequence of events in a patellar reflex arc.
Flexor muscles of the hamstrings relax to prevent antagonizing the quadriceps muscles A tap on the patellar ligament excites nerve endings of muscle spindles in the quadriceps femoris Stretch signals travel to the spinal cord via a primary afferent neuron. Efferent signals in the motor nerve fiber stimulate the quadriceps femoris to contract. 4 The alpha motor neuron to the hamstrings muscles is inhibited. A primary afferent nerve fiber stimulates an alpha motor neuron in the spinal cord. A branch of the afferent nerve fiber stimulates an inhibitory motor neuron in the spinal cord.Explanation / Answer
1.
a tap on the pataller ligamennt excites nerve endings of muscle spindles in the quadriceps femoris
2.
stretch signals travel to the spinal cord via a primary afferent neuron
3.
a primary afferent nerve fibre stimulates an alpha motor neuron in the spinal cord
4.
efferent signals in the motor nerve fibre stimulates the quadriceps to contract
5.
a branch of afferent nerve fibre stimulates an inhibitory motor neuron in the spinal cord
6.
The alpha motor neuron to the hamstrings muscle is inhibited
7.
flexor muscles of the hamstrings relax to prevent antagonizing the quadricpes muscle