BIOS 255 TEST 3 ACTUAL FINAL EXAM
WITH REAL QUESTIONS AND ANSWERS //
GRADED A+ // LATEST 2024/2025
//GUARANTEED PASS // BIOS 255
Each anterior root and its corresponding posterior root unite within the _______ to
become a spinal nerve. - ANSWER-intervertebral foramen
Dermatomes are clinically important because they can indicate potential damage to
one or more ______. - ANSWER-spinal nerves
The principal plexuses are the plexus, plexus, plexus, and sacral plexuses -
ANSWER-cervical or Cervical
Blank 2: brachial or Brachial
Blank 3: lumbar or Lumbar
One important branch of the cervical plexus is the phrenic nerve, which is formed
primarily from the ______ nerve and some contributing axons from ______. -
ANSWER-C4, C3 and C5
The cell bodies of ______ neurons are found in the posterior horns of the spinal
cord. - ANSWER-sensory
There are five roots of anterior rami that unite to form the superior, middle, and
inferior ______ in the posterior triangle of the neck. - ANSWER-trunks
,A spinal nerve contains ______ axons. - ANSWER-motor and sensory
The ______ rami of most spinal nerves form nerve plexuses on the right or left side
of the body. - ANSWER-anterior
The phrenic nerve travels through the thoracic cavity to innervate the ______. -
ANSWER-diaphragm
Each brachial plexus is formed by the anterior rami of spinal nerves ______. -
ANSWER-C5-T1
The left and right lumbar plexuses are formed from the ______ rami of spinal
nerves L1-L4 located lateral to the L1-L4 vertebrae and along the ______ muscle
in the posterior abdominal wall. - ANSWER-anterior, psoas major
The nerves emerging from a sacral plexus innervate the ______ region, pelvis,
perineum, posterior thigh, and almost all of the ______. - ANSWER-gluteal, leg
and foot
The sciatic nerve is actually composed of two divisions wrapped in a common
sheath. What are the two divisions? - ANSWER-Tibial and common fibular
A reflex arc is the neural wiring of a ______ reflex. - ANSWER-single
The lumbar plexus is subdivided into a(n) ______ division and a ______ division. -
ANSWER-anterior, posterior
,The left and right sacral plexuses are formed from the ______ rami of spinal
nerves ______ and are located immediately inferior to the lumbar plexuses. -
ANSWER-anterior, L4-S4
Choose the two primary functions of the nervous system. - ANSWER-
interpretation control
The anterior funiculus is composed of tracts of white matter that occupy the space
on each ______ side of the cord between the anterior gray horns and the anterior
______. - ANSWER-anterior, anterior median fissure
Some of the individual tracts conduct sensory impulses as ______ from the spinal
cord to the brain. - ANSWER-ascending tracts
The white matter of the spinal cord is ______ to the gray matter. - ANSWER-
external
The ______ horns primarily house the cell bodies of somatic motor neurons. -
ANSWER-anterior
The cell bodies of ______ neurons are found in the posterior horns of the spinal
cord. - ANSWER-sensory
The anterior funiculi are interconnected by the ______. - ANSWER-white
commissure
The axons within each white matter funiculus are organized into smaller structural
units called ______. - ANSWER-tracts
, A spinal nerve contains ______ axons. - ANSWER-motor and sensory
- ANSWER-A
matches
Choice, Posterior funiculus
Posterior funiculus
B
matches
Choice, Posterior horn
Posterior horn
C
matches
Choice, Lateral funiculus
Lateral funiculus
D
matches
Choice, Anterior horn
Anterior horn
Lateral horns are found in the ______ parts of the spinal cord only. - ANSWER-
T1-L2
the central nervous system is made of the - ANSWER-brain and the spinal cord
The peripheral nervous system is made of the spinal nerves, ganglia, and ---- -
ANSWER-cranial nerves
WITH REAL QUESTIONS AND ANSWERS //
GRADED A+ // LATEST 2024/2025
//GUARANTEED PASS // BIOS 255
Each anterior root and its corresponding posterior root unite within the _______ to
become a spinal nerve. - ANSWER-intervertebral foramen
Dermatomes are clinically important because they can indicate potential damage to
one or more ______. - ANSWER-spinal nerves
The principal plexuses are the plexus, plexus, plexus, and sacral plexuses -
ANSWER-cervical or Cervical
Blank 2: brachial or Brachial
Blank 3: lumbar or Lumbar
One important branch of the cervical plexus is the phrenic nerve, which is formed
primarily from the ______ nerve and some contributing axons from ______. -
ANSWER-C4, C3 and C5
The cell bodies of ______ neurons are found in the posterior horns of the spinal
cord. - ANSWER-sensory
There are five roots of anterior rami that unite to form the superior, middle, and
inferior ______ in the posterior triangle of the neck. - ANSWER-trunks
,A spinal nerve contains ______ axons. - ANSWER-motor and sensory
The ______ rami of most spinal nerves form nerve plexuses on the right or left side
of the body. - ANSWER-anterior
The phrenic nerve travels through the thoracic cavity to innervate the ______. -
ANSWER-diaphragm
Each brachial plexus is formed by the anterior rami of spinal nerves ______. -
ANSWER-C5-T1
The left and right lumbar plexuses are formed from the ______ rami of spinal
nerves L1-L4 located lateral to the L1-L4 vertebrae and along the ______ muscle
in the posterior abdominal wall. - ANSWER-anterior, psoas major
The nerves emerging from a sacral plexus innervate the ______ region, pelvis,
perineum, posterior thigh, and almost all of the ______. - ANSWER-gluteal, leg
and foot
The sciatic nerve is actually composed of two divisions wrapped in a common
sheath. What are the two divisions? - ANSWER-Tibial and common fibular
A reflex arc is the neural wiring of a ______ reflex. - ANSWER-single
The lumbar plexus is subdivided into a(n) ______ division and a ______ division. -
ANSWER-anterior, posterior
,The left and right sacral plexuses are formed from the ______ rami of spinal
nerves ______ and are located immediately inferior to the lumbar plexuses. -
ANSWER-anterior, L4-S4
Choose the two primary functions of the nervous system. - ANSWER-
interpretation control
The anterior funiculus is composed of tracts of white matter that occupy the space
on each ______ side of the cord between the anterior gray horns and the anterior
______. - ANSWER-anterior, anterior median fissure
Some of the individual tracts conduct sensory impulses as ______ from the spinal
cord to the brain. - ANSWER-ascending tracts
The white matter of the spinal cord is ______ to the gray matter. - ANSWER-
external
The ______ horns primarily house the cell bodies of somatic motor neurons. -
ANSWER-anterior
The cell bodies of ______ neurons are found in the posterior horns of the spinal
cord. - ANSWER-sensory
The anterior funiculi are interconnected by the ______. - ANSWER-white
commissure
The axons within each white matter funiculus are organized into smaller structural
units called ______. - ANSWER-tracts
, A spinal nerve contains ______ axons. - ANSWER-motor and sensory
- ANSWER-A
matches
Choice, Posterior funiculus
Posterior funiculus
B
matches
Choice, Posterior horn
Posterior horn
C
matches
Choice, Lateral funiculus
Lateral funiculus
D
matches
Choice, Anterior horn
Anterior horn
Lateral horns are found in the ______ parts of the spinal cord only. - ANSWER-
T1-L2
the central nervous system is made of the - ANSWER-brain and the spinal cord
The peripheral nervous system is made of the spinal nerves, ganglia, and ---- -
ANSWER-cranial nerves
