Please enable JavaScript.
Coggle requires JavaScript to display documents.
JacklinLako.nervoussystem.pdf (senses (stimulus types (chemoreceptorschemi…
JacklinLako.nervoussystem.pdf
nervous system organization
PNS
structure
cranial nerves and spinal nerves
function
spinal chord gathers the sensory information from the receptors and passes it on to CNS
Somatic Division
voluntary motor; mainly to skin, body wall, skeletal muscles torso/ trunk
CNS
structure
The central nervous system consists of brain and spinal chord.
function
recieves/ proceses and responds to sensory input
Autonomic division
involuntary motor; mainly ventral body cavity contents include smooth muscles, cardiac muscle- sweat glands arrector pilli muscle
senses
eye components
Vascular layer
choroid
Fibrous layer
Sclera 2. Cornea
inner layer
retina
cornea- lens- retina= optic nerve- optic chasm- optic tract- mid brain- thalamas- primary visual cortex in ociptral lobe
stimulus types
chemoreceptors
chemical; nose, tongue, and blood
Nociceptors
recept pain
photoreceptors
recept light
mechanoreceptors
touch, pressure, vibration, and stretch
Thermoceptors
- cold receptors and warmth receptors
Baroceptors
senstive to blood pressure
gustation components
taste buds (tongue, inner cheek, pharynx, palate epiglottis)
Pathway
3 cranial nerves; Facial nerve CNVII -> glossopharyngeal nerve CNIX -> Vagus CNX
stimulus origins
Exteroceptors
evironment, skin, and special senses such as sight, hearing, taste, and equilibrium
Proprioceptors
own self stimulus origin is muscle and their tendons, ligaments, and joints
Interoceptors
stimulus origin is internal
ear components
Aricl, tympanic membrane, auditory ossicles, cochlea nerve, vestibular nerve, vestibulochochlear nerve CNVIII
Pathway
Cochlear nerve --> medulla oblongata --> pons --> midbrain --> thalamus --> primary auditory corex in temporal lobe
olfaction components
roof of nasal cavity
olfactory tract -> limbic region -> emotional brain -> primary olfactory cortex in temporal lobe
pseudostratified collumnar epithelieum oflactory sensroy neurons, oflactory bulb --> olfactory tract
anatomy of the nervous system
nerve components
Glial Cells
CNS
Ependymal
simple cuboidal/ columnar epithelium with cilia. Location: ventricles, spaces filled with cerebral spinal fluid the cilia help circulate
Microglia
the smallest and least abundant, phagocyte,destroys invading microbes and damages dying neuron tissue
Astrocytes
most abundant glial cell, process contact, axons and capillaries are the smallest blood vessels, supportive, helping to maintain proper chemical environment
CNS myelination (Oligodendrocytes)
creation of myelin sheath
PNS
Satellite
surrounding neuron cell bodies in ganglia function: supportive helps regulate what goes in and out of the neuron cells bodies
Schwann
wrapping one piece of one axon
neurons
structural types
unipolar
bipolar
pseudounipolar
multipolar
functional types
sensory
sending signal in CNS
interneurons
in CNS only; between nuerons (multipolar structure)
Motor
sending signal away (Multipolar structure)
major components
soma (cell body)
carries out basic life purposes of a neuron
axon terminals
make the actual connection to other neurons
dendrites
the input for a neuron; designed to combine the information they get
axons
output of the neuron; carry information from the senses to the CNS, throughout the CNS, and from the CNS to muscles and glands to generate the behaviors we do.