PSL 310 Exam 2 (Neurophysiology -
PNS afferent) Questions and Correct
Answers.
The efferent output of the brain and spinal cord is to control.... - Answer all the effectors of
the body
What one thing does the somatic nervous system control? - Answer Skeletal muscle
What are the cells that line your stomach called? - Answer enterocytes
interoceptors do what? - Answer -internal receptors
-visceral senses (deep)
ex: nociceptors sense pain in stomach
exteroceptors do what? - Answer sense external environment; general senses are located in
your skin
Proprioceptors do what? - Answer located in muscles/joints/tendons and sense position of
muscle
How many pairs of cranial nerves are there?
How many pairs of spinal nerves are there? - Answer 12;
31
important cranial nerves: (what is each for?)
1. olfactory
2. optic
3. vagus
4. vestibulocochlear - Answer 1. smell
2. vision
3. heart/lungs/bronchi/gastro
4. hearing & equilibrium
3 types of cartilage;
, most abundant? least abundant? strongest? - Answer 1. Highland cartilage -most abundant
2. Fibro cartilage -least abundant & strongest
3. Elastic cartilage
What are the anatomical components of the peripheral nervous system (PNS) - Answer
cranial and spinal nerves
What is the functional organization of the PNS? In other words, can you schematically explain
the organization of the efferent division and the afferent division of the PNS? - Answer two
divisions of PNS: afferent & efferent
Afferent: sensory innervation; somatosensory, special sensory, and visceral innervation
Efferent: somatic and autonomic innervation
*Autonomic innervation includes cardiac, smooth muscle, glandular, and adipose innervation.
The autonomic system also breaks down into the sympathetic, parasympathetic, and enteric
nervous systems.
Sensory information enters the afferent division of the PNS. What are exteroceptors? - Answer
sensory receptors that receive external stimuli for both special and somatic senses, and send
the sensory information to the CNS
What are proprioceptors and what type of information do they send to the CNS? - Answer
sensors that provide information about joint angle, muscle length, and muscle tension, which is
integrated to give information about the position of the limb in space
What are interoceptors and what type of information do they send to the CNS? - Answer
Interoceptors are receptors that receive stimuli of internal organs
(visceral senses)
How many pairs of cranial nerves are there?
Do all cranial nerves contain both sensory and motor nerve fibers? - Answer 12;
some are mixed, but not all
How many pairs of spinal nerves are there? - Answer 31
What are the different types of intervertebral disc abnormalities that can occur and how can
these issues relate to spinal stenosis? - Answer Intervertebral disc deterioration and
herniation;
PNS afferent) Questions and Correct
Answers.
The efferent output of the brain and spinal cord is to control.... - Answer all the effectors of
the body
What one thing does the somatic nervous system control? - Answer Skeletal muscle
What are the cells that line your stomach called? - Answer enterocytes
interoceptors do what? - Answer -internal receptors
-visceral senses (deep)
ex: nociceptors sense pain in stomach
exteroceptors do what? - Answer sense external environment; general senses are located in
your skin
Proprioceptors do what? - Answer located in muscles/joints/tendons and sense position of
muscle
How many pairs of cranial nerves are there?
How many pairs of spinal nerves are there? - Answer 12;
31
important cranial nerves: (what is each for?)
1. olfactory
2. optic
3. vagus
4. vestibulocochlear - Answer 1. smell
2. vision
3. heart/lungs/bronchi/gastro
4. hearing & equilibrium
3 types of cartilage;
, most abundant? least abundant? strongest? - Answer 1. Highland cartilage -most abundant
2. Fibro cartilage -least abundant & strongest
3. Elastic cartilage
What are the anatomical components of the peripheral nervous system (PNS) - Answer
cranial and spinal nerves
What is the functional organization of the PNS? In other words, can you schematically explain
the organization of the efferent division and the afferent division of the PNS? - Answer two
divisions of PNS: afferent & efferent
Afferent: sensory innervation; somatosensory, special sensory, and visceral innervation
Efferent: somatic and autonomic innervation
*Autonomic innervation includes cardiac, smooth muscle, glandular, and adipose innervation.
The autonomic system also breaks down into the sympathetic, parasympathetic, and enteric
nervous systems.
Sensory information enters the afferent division of the PNS. What are exteroceptors? - Answer
sensory receptors that receive external stimuli for both special and somatic senses, and send
the sensory information to the CNS
What are proprioceptors and what type of information do they send to the CNS? - Answer
sensors that provide information about joint angle, muscle length, and muscle tension, which is
integrated to give information about the position of the limb in space
What are interoceptors and what type of information do they send to the CNS? - Answer
Interoceptors are receptors that receive stimuli of internal organs
(visceral senses)
How many pairs of cranial nerves are there?
Do all cranial nerves contain both sensory and motor nerve fibers? - Answer 12;
some are mixed, but not all
How many pairs of spinal nerves are there? - Answer 31
What are the different types of intervertebral disc abnormalities that can occur and how can
these issues relate to spinal stenosis? - Answer Intervertebral disc deterioration and
herniation;
