The nervous system consists of the cns central nervous system The nervous system Brain spinal chord and Peripheral nervous system somatic nervous and automatic nervous system The NS consist of 10 billion neurons and about 90 billion Glia cells hold neurons in place provide nutrients getting rid of waste The endocrine system Acts more slowly than ns The Neuron Acts through hormones chemicals realeased by endocrine glands into blood stream Major glands pituitary gland adrenal glands epinephrine neropinephrine Specialized cells that transmit nueral impulses 3 types of neurons sensory neurons transmist inf from receprotn to cns motor neurons transmit from cns to muscle glands interneurons transmit from sensory neurons to other Synaptic transmission when ap arrives at terminal button synaptic veicles containing neurotransmitters are released into the synaptic gap at receptor site lock and key action leads to changes in permeability of post synaptic membrane Once neurotransmitter is released its acrion should be brief This is achieved by 1 degredation enzymes break up neurotransmitter 2 re uptake of neurotransmitter Neurotransmitters Acetylcholine excitatory leanrning memory Norepinephrine excitatory mood regulation Dopamine inhibitory pleasure addiction schizophrenia Serotonin inhibitory mood and anciety GABA Inhibitory anxiety Temporal lobe functions memory understanding language comprehension auditory functioning hearing Parietal lobe sensory perception spatial reasoning determining left from right Occupital love functions making sense of visual imagery reading math vision contrast colors vision movement Other Brain areas Cerebellum movement Thalamus sensory relay station Hippocampus processes memories Amygdala emotion Hypothalamus and pituitary gland endocrine glands Endocrine system information signal system hormones released through the body to help stimulate or repress behaviors hormones also pass info about the state of the body Oligodendrocyte comprises the myelin sheath Neuron action Potential usually sitting in resting state usual about 75 mv graded potention level of stimulation needed for activation 55mv action potential is the electrical signal that flows along the surface of the neuron towards the terminal buttons all or none action potential goes at full power as soon as threshold is reached refractory period closes channels and forces the information to flow in only one direction split brain experiment
View Full Document
Unlocking...