A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
The large anterior gray horns of the spinal cord contain mainly - (ANSWER)somatic motor nuclei
Mary is in an automobile accident and suffers a spinal cord injury. She has lost feeling in her lower body.
Her doctor tells her that swelling is compressing a portion of her spinal cord. Which part of her cord is
likely to be compressed? - (ANSWER)ascending tracts
The spinal cord is part of the _____ nervous system. - (ANSWER)central
The neural "wiring" of a single reflex is called a(n) - (ANSWER)reflex arc
You are sitting at a Mexican restaurant waiting for your food. The waiter brings a very hot plate, telling
you to be careful about touching it. You touch it anyways, producing a pain sensation in your fingers, a
withdrawal of your hand, and an auditory comment of what you are thinking. This scenario represents a
_____ neuronal circuit. - (ANSWER)parallel processing
A motor neuron typically receives input from neurons that originate in various areas of the brain. This
type of circuit is a - (ANSWER)convergent circuit
Preganglionic and postganglionic fibers of the autonomic nervous system that innervate internal organs
are collectively called - (ANSWER)sympathetic nerves
A posterior and anterior root of each spinal segment unite to form a - (ANSWER)spinal nerve
Which of the following is not a way that reflexes are classified? -
(ANSWER)sympathetic/parasympathetic
Each of the following nerves originates in the lumbar plexus except the _____ nerve. - (ANSWER)sciatic
Nerve tracts or fasciculi make up the - (ANSWER)white columns
,A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
Spinal interneurons inhibit antagonist motor neurons in a process called - (ANSWER)reciprocal inhibition
Figure 13-1 The Spinal Cord
Identify the structure labeled "9". - (ANSWER)anterior gray commissure
Figure 13-2 Spinal Nerves
Identify the structure labeled "2". - (ANSWER)anterior ramus
Sensory information from visceral organs is carried by the - (ANSWER)sympathetic nerve
The _____ nerve, which arises in the cervical plexus, innervates the diaphragm. - (ANSWER)phrenic
In the condition _____, a virus infects posterior root ganglia, causing a painful rash whose distribution
corresponds to that of the affected sensory nerves as seen in their dermatomes. - (ANSWER)shingles
Spinal nerves from the sacral region of the cord innervate the _____ muscles. - (ANSWER)leg
Figure 13-1 The Spinal Cord
Identify the structure labeled "4". - (ANSWER)posterior gray horn
Recognized neuronal circuit patterns include all of the following except - (ANSWER)multipolar
The gray horns of the spinal cord contain mainly - (ANSWER)neuron cell bodies
The outward projections from the central gray matter of the spinal cord, seen easily in microscopic
spinal cord cross sections, are called - (ANSWER)horns
In _____, one neuron synapses on several postsynaptic neurons. - (ANSWER)divergence
,A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
The flexor reflex - (ANSWER)moves a limb away from a painful stimulus
The layer of meninges in direct contact with the spinal cord is the - (ANSWER)pia mater
Reflexes that activate muscles on the same side of the body as the stimulus are called -
(ANSWER)ipsilateral
Figure 13-2 Spinal Nerves
Identify the structure labeled "6". - (ANSWER)sympathetic ganglion
The postganglionic fibers that innervate glands in the body wall or smooth muscles in limbs are -
(ANSWER)gray rami communicantes
Enlarged area of the spinal cord from which nerves to the shoulder and upper limbs arise -
(ANSWER)cervical enlargement
The most complicated spinal reflexes are called - (ANSWER)intersegmental reflex arcs
The white matter of the spinal cord is mainly - (ANSWER)myelinated axons
A complex, interwoven network of nerves is called a - (ANSWER)plexus
Bundles of axons in the central nervous system are known as - (ANSWER)tracts
The complex, interwoven network formed by contributions from the anterior rami of neighboring spinal
nerves is termed a(n) - (ANSWER)plexus
The anterior root of a spinal nerve contains - (ANSWER)axons of motor neurons
, A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
In which plexus does the ulnar nerve arise? - (ANSWER)brachial
These structures extending from the pia mater through to the dura mater support the spinal cord by
preventing lateral movement - (ANSWER)denticulate ligaments
Which of the following associations is incorrect? - (ANSWER)11 thoracic spinal nerves
The layer of connective tissue that surrounds a fascicle within a peripheral nerve is the -
(ANSWER)perineurium
Which of the following is not true regarding an epidural block? - (ANSWER)This procedure does not
provide sustained anesthesia
The posterior root of a spinal nerve contains - (ANSWER)axons of sensory neurons
The conus medullaris anchors the spinal cord to the coccygeal ligament via a strand of fibrous tissue
called the - (ANSWER)filum terminale
Figure 13-2 Spinal Nerves
Ken has a herniated disc which is pinching the structure labeled "10". He is most likely experiencing
impairment in which sensory pathway? - (ANSWER)somatic and visceral sensory
Arrange the spinal meninges from innermost layer to outermost layer/ - (ANSWER)pia mater, arachnoid
mater, dura mater
The adult spinal cord typically ends between vertebrae - (ANSWER)L1-L2
A viral disease that destroys the cells of the anterior gray horn will - (ANSWER)lead to skeletal muscle
weakness or paralysis
The large anterior gray horns of the spinal cord contain mainly - (ANSWER)somatic motor nuclei
Mary is in an automobile accident and suffers a spinal cord injury. She has lost feeling in her lower body.
Her doctor tells her that swelling is compressing a portion of her spinal cord. Which part of her cord is
likely to be compressed? - (ANSWER)ascending tracts
The spinal cord is part of the _____ nervous system. - (ANSWER)central
The neural "wiring" of a single reflex is called a(n) - (ANSWER)reflex arc
You are sitting at a Mexican restaurant waiting for your food. The waiter brings a very hot plate, telling
you to be careful about touching it. You touch it anyways, producing a pain sensation in your fingers, a
withdrawal of your hand, and an auditory comment of what you are thinking. This scenario represents a
_____ neuronal circuit. - (ANSWER)parallel processing
A motor neuron typically receives input from neurons that originate in various areas of the brain. This
type of circuit is a - (ANSWER)convergent circuit
Preganglionic and postganglionic fibers of the autonomic nervous system that innervate internal organs
are collectively called - (ANSWER)sympathetic nerves
A posterior and anterior root of each spinal segment unite to form a - (ANSWER)spinal nerve
Which of the following is not a way that reflexes are classified? -
(ANSWER)sympathetic/parasympathetic
Each of the following nerves originates in the lumbar plexus except the _____ nerve. - (ANSWER)sciatic
Nerve tracts or fasciculi make up the - (ANSWER)white columns
,A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
Spinal interneurons inhibit antagonist motor neurons in a process called - (ANSWER)reciprocal inhibition
Figure 13-1 The Spinal Cord
Identify the structure labeled "9". - (ANSWER)anterior gray commissure
Figure 13-2 Spinal Nerves
Identify the structure labeled "2". - (ANSWER)anterior ramus
Sensory information from visceral organs is carried by the - (ANSWER)sympathetic nerve
The _____ nerve, which arises in the cervical plexus, innervates the diaphragm. - (ANSWER)phrenic
In the condition _____, a virus infects posterior root ganglia, causing a painful rash whose distribution
corresponds to that of the affected sensory nerves as seen in their dermatomes. - (ANSWER)shingles
Spinal nerves from the sacral region of the cord innervate the _____ muscles. - (ANSWER)leg
Figure 13-1 The Spinal Cord
Identify the structure labeled "4". - (ANSWER)posterior gray horn
Recognized neuronal circuit patterns include all of the following except - (ANSWER)multipolar
The gray horns of the spinal cord contain mainly - (ANSWER)neuron cell bodies
The outward projections from the central gray matter of the spinal cord, seen easily in microscopic
spinal cord cross sections, are called - (ANSWER)horns
In _____, one neuron synapses on several postsynaptic neurons. - (ANSWER)divergence
,A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
The flexor reflex - (ANSWER)moves a limb away from a painful stimulus
The layer of meninges in direct contact with the spinal cord is the - (ANSWER)pia mater
Reflexes that activate muscles on the same side of the body as the stimulus are called -
(ANSWER)ipsilateral
Figure 13-2 Spinal Nerves
Identify the structure labeled "6". - (ANSWER)sympathetic ganglion
The postganglionic fibers that innervate glands in the body wall or smooth muscles in limbs are -
(ANSWER)gray rami communicantes
Enlarged area of the spinal cord from which nerves to the shoulder and upper limbs arise -
(ANSWER)cervical enlargement
The most complicated spinal reflexes are called - (ANSWER)intersegmental reflex arcs
The white matter of the spinal cord is mainly - (ANSWER)myelinated axons
A complex, interwoven network of nerves is called a - (ANSWER)plexus
Bundles of axons in the central nervous system are known as - (ANSWER)tracts
The complex, interwoven network formed by contributions from the anterior rami of neighboring spinal
nerves is termed a(n) - (ANSWER)plexus
The anterior root of a spinal nerve contains - (ANSWER)axons of motor neurons
, A&P 1 101 MODULE 4 QUESTIONS AND ANSWERS 2025
In which plexus does the ulnar nerve arise? - (ANSWER)brachial
These structures extending from the pia mater through to the dura mater support the spinal cord by
preventing lateral movement - (ANSWER)denticulate ligaments
Which of the following associations is incorrect? - (ANSWER)11 thoracic spinal nerves
The layer of connective tissue that surrounds a fascicle within a peripheral nerve is the -
(ANSWER)perineurium
Which of the following is not true regarding an epidural block? - (ANSWER)This procedure does not
provide sustained anesthesia
The posterior root of a spinal nerve contains - (ANSWER)axons of sensory neurons
The conus medullaris anchors the spinal cord to the coccygeal ligament via a strand of fibrous tissue
called the - (ANSWER)filum terminale
Figure 13-2 Spinal Nerves
Ken has a herniated disc which is pinching the structure labeled "10". He is most likely experiencing
impairment in which sensory pathway? - (ANSWER)somatic and visceral sensory
Arrange the spinal meninges from innermost layer to outermost layer/ - (ANSWER)pia mater, arachnoid
mater, dura mater
The adult spinal cord typically ends between vertebrae - (ANSWER)L1-L2
A viral disease that destroys the cells of the anterior gray horn will - (ANSWER)lead to skeletal muscle
weakness or paralysis
