Chapter 7 Nervous Tissue And Nervous System

Chapter 7 Nervous Tissue And Nervous System CNS And PNS
Changes are done, please view the flashcard.

Preview Flashcards

Front Back
what does the central Nervous system contain
 
brain and spinal cord
what does the peripheral NS contain
 
spinal and cranial nerves
what are the 2 subdivisions of the peripheral NS
 
somatic autonomic
what does the somatic ns do
 
voluntary control of skeletal muscles
what does the autonomic ns do
 
involuntary control of smooth, cardiac, and glands
what are the 2 subdivisions of the autonomic ns
 
sympathetic parasympathetic
what does the enteric ns do
 
involuntary sinsory and motor control GI trac
name the nervous tissue cells
 
astrocytes microglua ependymal satellite schwann oligodendrocyte
tissue cell that contains the BBB
 
astrocytes
theis nervous tissue contains phagocytes that engulf foreign materials
 
microglia
this nervous tissue cell surrounds the cell body and insulates it
 
satellite
this nervous tissue cell contains CSF
 
ependymal
this nervous cell contains myelin in the PNS
 
schwann
this nervous cell contains myelin tissue in the CNS
 
oligodendrocyte
most common cell type
 
multipolar
in the retina ear and olfactory
 
bipolar
always sensory
 
unipolar
the afferent cells (into spinal cord)
 
sensory neurons
out of brain and into the body (efferent)
 
motor neurons
link sensory to motor
 
interneurons
name two types of electrochemical gradient
 
chemical electrical
what happens in the chemical gradient
 
ions move from high to low concentration
what happens in electrical gradient
 
ions move toward opposite charge
aka for nerve impulse
 
action potential
name the four steps in polarization and depolarization
 
1 - resting state 2 depolarization 3 repolarization 4 hyperpolarization
describe what happens in the resting state
 
gates on neuron are closed. NA is on outside and K (-) is on the inside
what happens in depolarization
 
NA flows into cell and the inside becomes +
what happens in repolarization
 
K comes out of the cell and the inside becomes -
what happens in hyperpolarization
 
NA/K pump kicks in and trades Na back to outside and K back inside the cell
what is the measurenent of the resting state
 
-70mv
what is the measurement for the threshold
 
-55mv
define all or none phenomenon
 
action potentials happem completely or not at all
how do we differentiate a light touch from a firmer touch?
 
frequency of impulses number of sensory neurons activated
what happens in continuous conduction
 
step by step depolarization of each protion of the membrane
what happens in saltatory conduction
 
depoarization only at noes of ranvier
which action potential is faster contunious or saltatory
 
saltatory
what is the CSF pathway direction
 
lateral ventricles - intercentricular foramen- 3rd ventricle- cerebral aqueduct - 4th ventricle- central canal
what keeps the brain from shifting side to side
 
fals cerebri
name the 3 brain parts that help secure the brain
 
falx cerebri tentoruim cerebilli calx cerebelli (floor support)
area of the brain for taste
 
primary gustatory area
precise, skilled, voluntary movement
 
primary (somatic) motor cortex
learned, repetitous or patterened motor skills such as walking
 
premotor cortex
motor speech area
 
broca's area
sensory information from skin and skeletal muscle
 
primary somatosensory cortex
informatio from the retinas
 
primary visual cortex
pitch, rhythm, and loudness
 
primary auditory cortex
intellect, cognition, recall, personality, reasoning, persistance, emotions, judgement
 
prefrontal cortex
what does the thalamus do
 
relay for sensory impulses, except smell to cortex
what does the basal nuclei do
 
regulate slow or stereotyped movements
what does the hypothalamus do
 
homeostasis, ANS control, hormones, temperature, feeding, thirst, hunger
what does the reticular activating system do
 
awaken from sleep and maintains consciousness filters out repettitive stimuli (able to ignore some noises while studying)
"inform" of body position & alcohol tester
 
proprioceptors
inner most meninge
 
pia mater
middle meninge
 
arachniod
outside meninge
 
dura mater
what is the end of the spinal cord called
 
conus medullaris
in adults what are the discs that are in the conus medullaris
 
L1
in a child what are the discs that are in the conus medullarus
 
L4
how many pairs of spinal nerves are there
 
31
how many cervical spinal nerves
 
8
how many thoracic spinal nerves
 
12
how many lumbar spinal nerves are there
 
5
how many sacral nerves
 
5
how many coccyx nerves
 
1
name the sensory receptors in the PNS
 
mechanoreceptors thermoreceptors photoreceptors chemoreceptors nociceptors
define mechanoreceptors
 
feel physical mechanical pressure
what do thermoreceptors do
 
feel temperature
what do photoreceptors do
 
detect light for eyes
define chemoreceptors
 
detects chemicals
define what niciceptors are
 
pain receptors inside and out
what do exteroceptors detect
 
external stimuli
what do interoceptors detect
 
internal stimuli
proprioceptors are where
 
musclesm tendons, joints and ligaments
name the cranial nerves
 
olfactory I optic II oculomotor III trochlear IV abducens VI facial VII vestibilocochlear VIII glossopharyngeal IX vagus X accessory XI hypoglossal XII
what does the olfactory nerve do
 
smell
optic nerve
 
vision
oculomotor III, trochlear IV, abducens VI
 
eye movement
trigeminal V
 
sensory- face mastication
facial VII
 
motor of face taste in anterior 2/3 tongue
vestibulocochlear VIII
 
hearing balance
glossopharyngeal IX
 
swallowing taste posterior 1/3 tongue
vagus X
 
taste - pharynx parasympathetic division to body
accessory XI location
 
sternocleidomastoid trapezius
hypoglossal
 
motor of tongue
Enter Password

  

Upgrade and get a lot more done!
Upgrade