Class 1 Flashcards
(42 cards)
most cells in the brain are supporting ___
neurons
neurons
cells that carry information through the nervous system
cell body (soma)
DNA and nucleolus of cell
4 major parts of neuron
cell body, dendrites, axon, and terminal
pre synaptic cell
neurons sending the neurotransmitter
post synaptic cell
neurons receiving neurotransmitter
glial cells
cells that contribute to the neurons function
astrocytes
store nutrients for future use by nearby neurons
oligodendrocytes
form the myelin that surrounds axons of the central nervous system
schwann cells
produce myelin in the peripheral nerves that target body parts and organs
microglia
removes debris left by damaged or dead neurons
radial glia cells
form a scaffolding that helps guide newly born neurons to their final destinations
gray matter
cell body of the cell
white matter
oligodendrocytes that wrap the axon
2 divisions of the nervous system
central nervous system (CNS) and Peripheral nervous system (PNS)
central nervous system
neurons that reside entirely within the brain and spinal cord
peripheral nervous system
allows central nervous system to communicate with the rest of the body
somatic nervous system
- division of PNS
-Voluntary movement
carries info from body to brain
autonomic nervous system
-division of PNS
-brain sending info to organs
sympathetic nervous system
- part of autonomic NS
-fight or flight (prepares body for emergency situations)
-elevate heart rate and O2 to muscles
parasympathetic nervous system
part of autonomic nervous system
-restores body to resting state (decrease heart rate and returns blood flow to normal)
how do MRI and CT scans work
take a ton of 2D pics
anterior
anything in the brain closest to your nose
posterior
in brain close to your back
