ZOOL 2403 Lecture Exam 2- Dr. Boros
TTU Study Questions and Answers 2025
/. Root is to ____ as ganglion is to ___ - Answer-✅axons; cell bodies
/.ventral is to ____ as dorsal is to _____ - Answer-✅motor; sensory
/.white matter is to ____ as gray matter is to ____ - Answer-✅axons; cell bodies
/.Spinal Meninges (three layers) - Answer-✅dura mater, arachnoid mater, pia mater
/.Spinal Meninges functions - Answer-✅protect spinal cord and provide it with oxygen
and nurtrients
/.where is CSF - Answer-✅in subarachnoid space (between arachnoid and pia mater)
/.CSF provides spinal cord with: - Answer-✅physical and chemical protection
/.As you go down the spinal cord, the ____ white matter - Answer-✅less
/.conus medullaris - Answer-✅caudal end of spinal cord; CNS
/.cauda equina - Answer-✅spinal nerves inferior to conus medullaris; only contains
axons; PNS
/.divisions of spinal cord (CNS) - Answer-✅gray matter and white matter
/.Gray Matter - Answer-✅composed of neuron cell bodies
/.dorsal gray matter - Answer-✅cell bodies of sensory neurons receive and sum signals
from PNS sensory neurons
/.ventral gray matter - Answer-✅cell bodies of motor neurons receive and sum signals
from brain motor neurons
/.white matter - Answer-✅contains ascending and descending fiber (AXON) pathways
/.ascending pathways - Answer-✅relays sensory info from spinal cord to brain
, /.descending pathways - Answer-✅relays motor info from brain to spinal cord
/.spinal nerve divisions - Answer-✅dorsal root and ventral root
/.dorsal root - Answer-✅contains axons
cell bodies in dorsal root ganglion
carry sensory info from peripheral receptors to spinal cord
/.ventral root - Answer-✅contains axons
cell bodies are in spinal cord
carry motor info from spinal cord to muscles
/.spinal nerves travel through ____ - Answer-✅intervertebral foramen
/.spinal nerves are surrounded by ____ - Answer-✅connective tissue wrappings
/.epineurium - Answer-✅outermost layer; surrounds entire spinal nerve; dense irregular
CT
/.perineurium - Answer-✅wraps axons into fasicles; dense irregular CT
/.endoneurium - Answer-✅surround Shwann cell; loose CT
/.lesion of spinal nerve= ____ nerves affected - Answer-✅sensory and motor
/.lesion of dorsal root=___ axons affected - Answer-✅sensory
/.lesion of ventral root= ___ axons affected - Answer-✅motor
/.intercostal nerves innervate: - Answer-✅muscles of trunk
skin of trunk
/.spinal nerve plexus innervates - Answer-✅muscles of neck and limbs
skin of neck and limbs
/.cervical plexus innervates - Answer-✅muscles and skin of neck
/.brachial plexus innervates - Answer-✅muscles and skin of pectoral girdle and upper
limbs
/.lumbrosacral plexus innervates - Answer-✅muscles and skin of pelvic girdle and lower
limbs
TTU Study Questions and Answers 2025
/. Root is to ____ as ganglion is to ___ - Answer-✅axons; cell bodies
/.ventral is to ____ as dorsal is to _____ - Answer-✅motor; sensory
/.white matter is to ____ as gray matter is to ____ - Answer-✅axons; cell bodies
/.Spinal Meninges (three layers) - Answer-✅dura mater, arachnoid mater, pia mater
/.Spinal Meninges functions - Answer-✅protect spinal cord and provide it with oxygen
and nurtrients
/.where is CSF - Answer-✅in subarachnoid space (between arachnoid and pia mater)
/.CSF provides spinal cord with: - Answer-✅physical and chemical protection
/.As you go down the spinal cord, the ____ white matter - Answer-✅less
/.conus medullaris - Answer-✅caudal end of spinal cord; CNS
/.cauda equina - Answer-✅spinal nerves inferior to conus medullaris; only contains
axons; PNS
/.divisions of spinal cord (CNS) - Answer-✅gray matter and white matter
/.Gray Matter - Answer-✅composed of neuron cell bodies
/.dorsal gray matter - Answer-✅cell bodies of sensory neurons receive and sum signals
from PNS sensory neurons
/.ventral gray matter - Answer-✅cell bodies of motor neurons receive and sum signals
from brain motor neurons
/.white matter - Answer-✅contains ascending and descending fiber (AXON) pathways
/.ascending pathways - Answer-✅relays sensory info from spinal cord to brain
, /.descending pathways - Answer-✅relays motor info from brain to spinal cord
/.spinal nerve divisions - Answer-✅dorsal root and ventral root
/.dorsal root - Answer-✅contains axons
cell bodies in dorsal root ganglion
carry sensory info from peripheral receptors to spinal cord
/.ventral root - Answer-✅contains axons
cell bodies are in spinal cord
carry motor info from spinal cord to muscles
/.spinal nerves travel through ____ - Answer-✅intervertebral foramen
/.spinal nerves are surrounded by ____ - Answer-✅connective tissue wrappings
/.epineurium - Answer-✅outermost layer; surrounds entire spinal nerve; dense irregular
CT
/.perineurium - Answer-✅wraps axons into fasicles; dense irregular CT
/.endoneurium - Answer-✅surround Shwann cell; loose CT
/.lesion of spinal nerve= ____ nerves affected - Answer-✅sensory and motor
/.lesion of dorsal root=___ axons affected - Answer-✅sensory
/.lesion of ventral root= ___ axons affected - Answer-✅motor
/.intercostal nerves innervate: - Answer-✅muscles of trunk
skin of trunk
/.spinal nerve plexus innervates - Answer-✅muscles of neck and limbs
skin of neck and limbs
/.cervical plexus innervates - Answer-✅muscles and skin of neck
/.brachial plexus innervates - Answer-✅muscles and skin of pectoral girdle and upper
limbs
/.lumbrosacral plexus innervates - Answer-✅muscles and skin of pelvic girdle and lower
limbs
