Nervous system Flashcards
Nervous system ___ and ___ to stimuli
receive and respond to
what are the cells that receive stimulus
Receptor Cells
Central nervous system consists of?
Brain and Spinal cord
what is the Peripheral nervous system?
All the nerves leaving the cns
Nervous system consist of?
Neurons:
Sensory neuron
Motor neruon
Interneuron
function of sensory neuron?
conduct impulses from the receptors to the cns
function of motor neuron?
conducts impulses from cns to the effectors (muscles & glands)
A neuron concise of? and it’s functions
Dendrite - takes impulses to cell body
cell body
axon - takes impulse away from cell body
explain how we react to a stimulus
- stimulus is observed
- stimulus is converted to an electrical impulse
- impulse is sent to brain
- brain interprets the impulse and sends it to muscles to perform the action
“Certain reactions are reflex reactions”
what is a reflex?
A fast automatic response to a stimulus to prevent injury.
explain a normal action (like the steps)
stimulus - receptor - sensory neuron - cerebrum - motor neuron - effector
explain a reflex action
stimulus - receptor - sensory neuron - spinal cord - motor neuron - effector
what is the brain protected by?
the skull
3 meninges
cerebro - spinal fluid
function of cerebrum?
- interpret information from all the senses
- voluntary movement
- emotions
- intelligence
- memory
functions of cerebellum?
- muscle coordination (carries out movement )
- maintains balance & posture
Medulla oblongata functions?
- controls reflexes such as:
breathing
heart rate
blood pressure
swallowing
(connects brain to spinal cord)
Thalamus functions?
controls:
body temperature
sleep
feelings of hunger and thirst
aggression
function of occipital lobe
processing visual information from eyes
temporal lobe function?
processes auditory information from ears
parietal lobe function?
interprets skin sensations/sensory information
frontal lobe function?
- origin of voluntary movement
- reasoning and thought
