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nervous system

study for chapter 8 nervous system

Thalmus function superior to hypothalmus and inferior to cerebrum. controls sensory impulses (except smell.)
Frontal lobe function voluntary movement motor area to control movement
effects of sympathetic response dominate in stressful situations, heart rate increases, vasodilation in skeletal muscles, bronchioles dialate, liver changes glycogen to glucose, digestive secretions decrease, peristalsis slows, vasoconstriction in skin
neurotransmitters enables nerve impulses to cross synapses
cranial nerve I olfactory-smell
cranial nerve II optic-sight
cranial nerve III Oculometer-movement of eyeball
cranial nerve IV trochler-movement of eyeball
cranial nerve V trigreminal-sensation in face, scalp, and teeth, contraction of chewing muscles
cranial nerve VI abducens-movement of eyeball
cranial nerve VII facial-sense of taste, contraction of facial muscles, secretion of saliva
cranial nerve VIII acoustic or vestibulocohlear- hearing or equilibrim
cranial nerve IX glossopharyngeal- sense of taste, sensory for cardiac, respiratory, bp reflexes, contraction of pharynx, secretion of saliva
cranial nerve X vagus-sensory in cardiac, respiratory, bp reflexes, sensory and motor to larynx, decreases heart rate, contraction of alimentary tube, increases digestive secretions
cranial nerve XI accessory- contraction of neck and motor to larynx (speaking)
cranial nerve XII hypoglossal- movement of tongue
cerebrum function movement, sensation, learning, memory
function of nervous system to detect change and feel sensation, initiate appropriate responses to change, organize info for immediate use and store for future use
neuron anatomy cell body, dedrites, axon, schwann cells, myelin sheath, neurolemma
interneuron entirely within the cns- carries only sensory or motor impulses or to integrate these functions
reflex arc pathway nerve impulses travel when a reflex is elicited
5 essential parts of a reflex arc receptors, sensory neurons, cns,motor neurons, effector
outermost layer of meninges fibrous connective tissue called dura mater
connection for the cerebral hemisphere corpus callosum-band of nerve fibers that connects right and left cerebral hemisphere
cerebrum lobes frontal,parietal,temporal,occipital
frontal lobes voluntary movement
parietal lobes sensory
temporal smell
occipital visual , thinking
myelin producing cells schwann cells, oligodendrocytes,neuroglia(glia cells) microglia, astrocyte
blood brain barrier prevents potentially harmful waste products in the blood from diffusing out in to brain tissue
synaptic transmission small gap or pace between the axon and neuron and the dendrites or cell body of the next neuron is the synapse. transmission is carried from 1 to the next by neurotransmitter . a chemical inactivator is use to prevent unwanted continuous impulses
Nueron insulator schwann cells,myelin sheaths
cerebellum function movement
neuron efferent sensory
neuron afferent motor
chemical impulse occurs at synapse
electrical impulse occurs at neurons
white matter made of myelinated axons and dendrites of interneurons
cerebral spinal fluid and anatomy in the central canal and is continuous with cavities in the brain called ventricles. works as an insulator
division of nervous systems central, peripheral(including autonomic)
mixed nerve contains both sensory and motor neurons. most of peripheral nerves are mixed nerves(sciatic)
patellar reflex knee jerk-tap on patellar tendon just below the knee cap causes extension of the lower leg. this is a stretch reflex
thalmus is superior to the hypothalmus and inferior to the cerebrum. the third ventricle is a narrow cavity that passes through both thalmus and hypothalmus. functions are concerned with sensation.
frontal lobe function motor area that generates impulses for voluntary movement of hands and face.
Created by: kim19smith66