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Biological aspects of psychology (Neuron (Axon, Myelin sheath, Nucleus,…
Biological aspects of psychology
Neuron
Axon
Myelin sheath
Nucleus
Nodes or Ranvier
Cell body
Axon terminal
Dendrites
Neuron communication
Electrical charges are converted to chemical messages
Resting membrane potential
-70 mV
Postsynaptic potential
Excitatory
Depolarise
Make more positive
Inhibitory
Hyperpolarise
Make more negative
Axonal conduction
Myelination
nodes of Ranvier
Action potential regenerated
Velocity
size and myelination of axon
motor neuron 60 m/s
Message termination
Reuptake
Enzyme degradation
Somatic nervous system
Interact with external environment
Efferent - motor info out
Afferent - sensory info in
Autonomic nervous system
Regulates internal environment
Afferent and efferent
Sympathetic
Fight or flight
Parasympathetic
Rest and digest
CNS
Spinal cord
Directs reflexes
Relays signals to brain/muscle
Brain
Forebrain
Limbic system
Amygdala
Hippocampus
Basal ganglia
Thalamus
Hypothalamus
Corpus callosum
Midbrain
helps orient body movement towards auditory and visual stimuli
Cerebral cortex
Voluntary movement and cognition
Grey matter
4 lobes (FPOT)
Hindbrain
cerebellum
medulla
pons
reticular formation
Endocrine system