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biology test4/22

Chapter

QuestionAnswer
cerebellum muscle coordination, skilled movements, posture, balance
thalamus rely station for sensory impulses and motor impulse signals
hypothalamus important in maintaining homeostasis...hunger, thirst, temp, and hormone production waking state, anger/rage
cns Central nervous system..the brain and spinal cord
PNS peripheral nervous system...nuerons outside bain and spinal cord
sensory nuerons carry signals from outside to CNS
motor neurons carry signal from CNS to spinal cord
myelin sheath speeds up the transmission of a signal
resting potential negative charge
threshold enough of a stimulus to cause a signal to travel
action potential NA+ rushes into the node causing a positive charge within
refractory period time it takes for membrane to return to a negative charge
cerebrum sensory process and motor response as well as emotional and intellectual process
left heemispere thought and verbal thought
right hemisphere visual and artistic use
retina contains the photo receptors
rods adjusts to dim lights (cant replenish in dark)
cones (central foreva) responds to bright lights
optic nerve blind spot, nuerons that send visual signal to the brain
local anesthetics block the opening of the NA+ channels therefore
Advil blocks nociceptors( pain receptors)
strychine poisoning binds to and blocks receptors on inhibitory neurons on post synaptic end so body cant relax
pyshacative drugs alter tissue in the NS
epilepsy discharge from millions of neurons
addiction exposed neuron that craves signal
negitive feed back loop step in series that stops an initial step returns to the body to homeostasis
negative feedback loop fight or flight
reflex goes from stimulus to spinal cord back to muscle
Created by: 100000241312320
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