Peripheral Nervous System

Question 1

4 main subdivisions

Answer 1

somatic sensory: sensory innervation of outer tube (skin, trunk wall) and limbs
visceral sensory: sensory innervation of viscera
somatic motor (voluntary motor): motor innervation of skeletal muscles of outer tube and limbs
visceral motor (autonomic nervous system): involuntary motor innervation of the inner tube, some outer tube structures, and smooth muscle in blood vessels

Question 2

somatic sensory

Answer 2

general somatic senses
proprioceptive senses
special somatic senses

Question 3

general somatic senses

Answer 3

touch
pain
vibration
pressure
temperature

Question 4

proprioceptive senses

Answer 4

detect stretch in tendons, joint capsules, and muscles

body sense: position and movement of body in space

Question 5

general visceral senses

Answer 5

stretch, pain, temperature, nausea, hunger

widely felt in urinary tracts, reproductive organs, digestive tracts, and other viscera

Question 6

special visceral senses

Answer 6

taste chemical receptors in tongue

smell chemical receptors in nose

Question 7

special somatic senses

Answer 7

equilibrium
hearing
vision

Question 8

somatic motor division

Answer 8

signals contraction of skeletal muscles
under voluntary control
often called “voluntary nervous system”

Question 9

visceral motor division

Answer 9

autonomic nervous system
regulates the contraction of smooth muscle, cardiac muscle, and glandular secretion
controls function of visceral organs
often called “involuntary nervous system”
parasympathetic and sympathetic elements

Question 10

sensory receptors: classification by location

Answer 10

exteroreceptors: located at or near body surfaces
interoreceptors: located in digestive tube, bladder, and lungs
proprioceptors: located in skeletal muscles, tendons, joints, and ligaments

Question 11

exteroceptors

Answer 11

sensitive to stimuli arising from outside the body
located at or near body surfaces
include receptors for touch, pain, temperature, and pressure

Question 12

interoceptors

Answer 12

receive stimuli from internal viscera
located in digestive tube, bladder, and lungs
monitor a variety of stimuli, eg changes in chemical concentration, taste stimuli, stretching of tissues, temperature

Question 13

proprioceptors

Answer 13

located in skeletal muscles, tendons, joints, ligaments
monitor degree of stretch
send inputs on body movement to the CNS

Question 14

proprioception

Answer 14

sense of where body parts are in relation to one another

Question 15

sensory receptors: classification by stimulus detected

Answer 15

mechanoreceptors
thermoreceptors
chemoreceptors
photoreceptors
nociceptors