Anat 215 - Block Theory Evaluation #2 Questions with Correct Answers
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Course
Psych 3300
Institution
Psych 3300
Peripheral Nervous System (PNS) Correct Answer-the sensory and motor neurons that connect the central nervous system (CNS) to the rest of the body.
What are the two major nerves that exist in the peripheral nervous system? Correct Answer-spinal nerves (carry information to and from the spinal co...
Anat 215 - Block Theory Evaluation #2 Questions with
Correct Answers
Peripheral Nervous System (PNS) Correct Answer-the sensory and
motor neurons that connect the central nervous system (CNS) to the rest
of the body.
What are the two major nerves that exist in the peripheral nervous
system? Correct Answer-spinal nerves (carry information to and from
the spinal cord) and cranial nerves (carry information to and from the
brain)
Divisions of the peripheral nervous system Correct Answer-the sensory
(afferent) and motor (efferent division)
Sensory (afferent) division Correct Answer-somatic and visceral sensory
nerve fibers which conduct
impulses from receptors to the CNS
somatic afferents Correct Answer-sensory fibers that convey impulses
from the skin, skeletal muscles and joints
visceral afferents Correct Answer-Sensory fibers that convey impulses
from the visceral organs (organs within the ventral cavity).
,Motor (efferent) division Correct Answer-includes both somatic and
autonomic neurons which carry information away from the central
nervous system to effector organs
somatic efferent neurons Correct Answer-carries information from the
CNS to skeletal muscles; we can consciously control the activity of these
muscles
autonomic efferent neurons Correct Answer-connect the CNS to
autonomic effectors including smooth muscle, cardiac muscle, glands,
and epithelia
How many spinal nerves are there? Correct Answer-31 pairs
8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal
How are spinal nerves formed? Correct Answer-by the combination of
the ventral and dorsal roots of the spinal cord
Nerve plexuses are... Correct Answer-interwoven networks of nerves
,What are the 2 major plexuses within the peripheral nervous system?
Correct Answer-brachial and lumbosacral plexuses
brachial plexus Correct Answer-a network of nerve axons (C5-C8, T1)
which supply the upper limbs
lumbosacral plexus Correct Answer-a network of nerve axons of the
spinal nerves (T12-S4), which supply the lower limbs
Dermatomes are Correct Answer-an area of the skin innervated by the
by the cutaneous branches of a single spinal nerve
What nerve branches are involved in the formation of dermatomes?
Correct Answer-only ventral branches
What spinal nerves participate in the formation of dermatomes? Correct
Answer-all spinal nerves except C1 since it does not have a sensory root
What are the 5 components of reflexes? Correct Answer-receptor,
sensory neuron, integration center, motor neuron, effector
somatic reflexes Correct Answer-- produced by the somatic nervous
system and innervates skeletal muscle.
- induced by stimulation of somatic sensory nerve endings
, visceral reflexes Correct Answer-- produced by the autonomic nerves
and initiated in the viscera
- activates smooth and cardiac muscles or glands
How many cranial nerves are there? Correct Answer-12 pairs
Mnemonic for cranial nerves Correct Answer-On Occassion Our Trusty
Truck Acts Funny. Very Good Vehicle Any How.
Mnemonic for cranial nerve type Correct Answer-Some Say Marry
Money But My Brother Says Big Brains Matter More
olfactory nerve (CN I) Correct Answer-originates from the cerebrum and
conducts nerve impulses for smell (sensory)
optic nerve (CN II) Correct Answer-originates at the cerebellum and
innervates at the retina as it carries impulses from the retina to the brain
to provide the sense of sight (sensory)
Oculomotor nerve (CN III) Correct Answer-originates from the
midbrain and innervates at the eye where it enables eye movement,
constriction of the pupil and lens accommodation (motor)
Trochlear Nerve (CN IV) Correct Answer-originates from the midbrain
and innervates the superior oblique muscle allowing for movement of
the eyeball
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