Chapter 14 – Spinal Cord and Spinal Nerves | Verified Q&A on Reflex Arcs, Plexuses, Tracts, and Neuron Pathways

Chapter 14: Spinal Cord and Spinal Nerves questions
with verified answers
A descending motor tract of the direct pathway is the ______ tract.


lower motor
corticospinal
lateral
rubrospinal Ans✓✓✓corticospinal


A first-order neuron is also known as a _________ neuron.
Ans✓✓✓primary


A first-order neuron synapses with a ______ neuron.


tertiary
second-order
motor Ans✓✓✓second-order


A nerve plexus is a network of interweaving ______ of spinal nerves.


anterior rami
collateral rami
lateral rami

,posterior rami Ans✓✓✓anterior rami


A reflex arc always begins at a receptor in the ______, communicates
with the ______, and ends at a peripheral effector, such as a muscle or
gland cell.


PNS; CNS
CNS; PNS
skin; PNS Ans✓✓✓PNS; CNS


A reflex arc is a neural pathway composed of neurons that control rapid,
__________ responses to a stimulus.


conscious, random
conscious, preprogrammed
subconscious, random
subconscious, preprogrammed Ans✓✓✓subconscious; preprogrammed


A second-order neuron ______.


is the second neuron in a motor pathway
is the second-longest neuron in either a sensory or a motor pathway
is an interneuron Ans✓✓✓is an interneuron

, A second-order neuron is also known as a ___________ neuron.
Ans✓✓✓secondary


A secondary neuron extends from a primary neuron to the ______.


first-order neuron
tertiary neuron or cerebellum
second-order neuron Ans✓✓✓tertiary neuron or cerebellum


A spinal nerve contains ______ axons.


only motor
only interneuron
only sensory
motor and sensory Ans✓✓✓motor and sensory


A stretch reflex is a ______ reflex that monitors and regulates skeletal
muscle length.


monosynaptic
oligosynaptic
polysynaptic Ans✓✓✓monosynaptic


A third-order neuron extends from the secondary neuron to the ______.