biological foundations of behavior
theres a link between our brain and our emotions
see through your ears
plasticity; when ur blind your brain enhances one sense to compensate for loss of another
smells trigger emotions in the brain
only sense linked to memory
limbic system
where are neurons found
brain and spinal cord
what are neurons
- they vary in shape
- they’re the building blocks of the nervous system
- they’re supported by gilial ceus that keep the neurons in shape and remove toxins
structure of neuron
cell body dendrites (receivers) axon axon terminal milan sheath (allows conduction to be quick and smooth) neurons dont touch
why is yawning contagious
mirror neurons; found on both sides of the brain makes one feel empathy people with autism don't have it sociopaths have 0 empathy
3 types of neurons in the nervous system
sensory neurons
motor neurons
interneurons
2 types of peripheral neurons
somatic; voluntary movement
autonomic; sympathetic (activation, arousal function) and parasympathetic (slows down body processes)
together the sympathetic and the parasympathetic keep the body in balance… homeostasis
resting potential
-70, the uneven distribution of - and + in the neuron
what happens when the neuron is stimulated
the channels open and the sodium enters the neuron (+40)
hyper polarization
k+ is pumped out in too many quantity (less than -70)
absolute refractory period
during depolarization
the going down part of the chart
if the neuron is stimulated no action potential will happen until the process is done
neurotransmitters
chemicals produced that carry messages from one neuron to another
neurotransmitters
chemicals produced that carry messages from one neuron to another
list all the key neurotransmitters and their functions
acetylcholine;
- muscle actions, learning, memory
- black widow venom (increase ace)
- botox (decrease ace)
- alzheimers (decrease ace)
GABA;
-anxiety (decrease)
Glutamate;
-excitatory, learning, memory
list all the key neurotransmitters and their functions
acetylcholine;
- muscle actions, learning, memory
- black widow venom (increase ace)
- botox (decrease ace)
- alzheimers (decrease ace)
GABA;
-anxiety (decrease)
nt and functions 2
Glutamate;
-excitatory, learning, memory
Norepinephrine;
- stress, depression (decrease)
- mania, excess happiness (increase)
Dopamine;
- happy, pleasure, voluntary movement
- parkinsons (decease)
- schitzo ( increase)
nt and functions 3
Seratonine
- mood, attention
- depression (decrease)
- prozac (increase)
endorphins
-pain relief, natural panadol
Oxytocin
- love, bonding
- neurotransmitter and hormone at the same time
- onset of lactation