Transcript WARM UP 4/20

WARM UP 4/20
List all the part of the
brain that will be on
your quiz. After
each, write down a
little note for you to
remember where the
part is.
EX: gyri - ridges
pons – bump near
bottom of brain
NOTES CH 11 4/20
Brain physiology
Neurons
Nerve cells
Brain is made up of
billions of these
NEURON VOCAB
• Axon - sends messages
away
• Dendrite - receives
messages
• Synaptic knobs – ends of
axons
• Receptors – ends of
dendrites
• Myelin sheath - covering
around the axon to
protect it
• Synapse – space between neurons
• Neurotransmitter - chemical that brings messages
across gap (EX: Ach)
• Action potential – electrical impulse
DO NOT WRITE
Neurotransmitter imbalances have been implicated in several diseases
such as Alzheimer's disease and Parkinson's disease, and in a
variety of psychiatric illnesses such as schizophrenia and depression.
Many drugs work by altering the level of specific neurotransmitters in
the brain (see, e.g., cholinesterase inhibitors).
*Messages can only go one direction
neurons that bring messages to the brain efferent neurons
bring messages away from the brain -afferent
neurons
within the brain - interneurons
The brain working
• Message from the body gets sent to
proper area in the brain and the brain
interprets what the message is
AND/OR
• Brain can start a message and send it to a
part of the body to cause a reaction
LABELING
FROM NEURON TO NEURON:
1.
Action potential travels down
axon
2.
Reaches the synaptic knob
3.
Neurotransmitters release
chemicals
4.
Chemicals move across
synapse
5.
Attach to receptors on
dendrite of next neuron
6.
Na+ rushes in
7.
Action potential travels down
axon
(repeats till reaches its
destination)
(Think of it like dominos!!)
Through the whole body
1.
2.
3.
4.
5.
Stimulus detected by
receptors
Impulse travels through
neurons to spinal cord
Travels up spinal cord
to brain
Reaches proper area
and brain interprets
message
Message can stop here
OR cause reaction
6. Brain sends message in response
7. Impulse travels down spinal cord
8. Travels away from s.c. to muscle or
gland
9. Reaction happens