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68 Cards in this Set

  • Front
  • Back

axon

conduct cell's output information



multipolar


bipolar


unipolar


neuron

many dendrites, one axon


single dendrite and single axon


single branch extending in two directions serving as both dendrite and axon

axon terminal

output zone

dendrites

input zone


where neurons receive information

presynaptic membrane

transmits information by releasing neurotransmitters

postsynaptic membrane

recieves information

synaptic celft

space between pre and postsynaptic membranes

myelin sheath



fatty insulation formed by glial cells that improves speed of neural impulses

node of ranvier

gap in between myelin where axon membrane is exposed

primary glia cells

astrocytes, oligodendrocytes, Schwann cells

astrocyte

glia cell in between neurons


control blood flow, modulate neural activity


CNS

oligodendrocyte

glia cell


forms myelin in CNS

Schwann cell

glia cell


form myelin in PNS

neuron

transmit information


regulate cognitive, sensory, motor function

glial cells

astrocytes&oligodendrocytes(CNS), Schwann (PNS) modulate, support, and insulate neurons

white


grey


matter

myelinated nuerons and glia


unmyelinated

central nervous system

spinal cord and brain



peripheral nervous system

nerves that extend through body


autonomic: parasympathetic and sympathetic

parasympathetic

calms body

sympathetic

promotes emergency functions

four lobes

frontal, occipital, temporal, parietal

frontal

motor

occipital

visual

parietal

sensory

temporal

auditory

basal ganglia

movement, motivation/reward

limbic system

learning, memory, emotion


amygdala, hippocampus,cingulate gyrus, olfactory bulb,hypothalamus

amygdala

emotional regulation

hippocampus and fornix

learning and memory

cingulate gyrus

cognitive functions

olfactory bulb

sense of smell

hypthalamus

vital functions and pituitary gland: hormonal system

thalamus

directs all incoming sensory information

meninges

3 protective membranes for brain and spinal cord


dura, pia, arachnoid, CSF

lateralization

looking at hemispheres seperately

CNS growth

neural tube, hindbrain, midbrain, forebrain

hindbrain

will become cerebellum, pons, medulla

midbrain

brainstem

forebrain

telencephalon- cerebral hemispheres


diencephalon-thalamus and hypothalamus

ontogeny recapitulates phylogeny

we move through brain processes from conception to birth

neurogenesis

production of neurons from non-neural cells

ventricular zone

where cells start in neural tube

stem cells

undifferentiated cells that will differentiate in an appropriate way when placed in particular brain region

cell differentiation

enables cells to acquire the appearance and functions of neurons characteristic of that particular region

radial glia

only present during development, supports migrating neurons

neurotrophic factors

target derived chemicals that feed neurons to help them survive


neurons that receive enough survive

apoptosis

naturally occurring cell death


typically in development

necrosis

injury-induced death


trauma, infection, and disease

neurogenesis

mitotic division of non-neural cells to produce neurons

cell migration

mass movements of nerve cells to establish nerve cell populations

cell differentiation

refining of cells into types of neurons or glial

synaptogenesis

formation of synapses

williams syndrome

sub-type mental retardation,good language skills, spatial and visual deficits, cardiovascular problems, deletion of ch7



down syndrome

trisomy 21, mental retardation, impairment of cognitive ability,

autism

impairments in social interaction and communication, mirror neurons-- early problems can lead to disability, sensory, language, and social impairments


unknown cause

mirror neurons

important for imitation learning and understanding intentions and emotions of others

dyslexia

reading impairment, anoxia, low birth weight

axon hillock

cone shaped area on cell body from which the axon originates

synaptic vesicles

contain neurotransmitters

ionotropic receptor

protein receptor channel that opens directly when transmitter binds to it

metabotropic receptor

causes chain of chemical reactions and indirectly alters ion movement, slower

ligand


receptor

substance that binds - key


receptacle for binding- lock

affinity

how likely it is the ligand with bind to the receptor

agonist

receptor promoter, binds and activates receptor, or increases binding affinity or a receptor ligand)

antagonist

receptor inhibitor (binds and blocks receptor- competitive), binds elsewhere but prevents activation (noncompetitive), or decreases binding affinity of a receptor ligand

re-uptake inhibitor

inhibits presynaptic reuptake of ligand, leaving transmitter in synaptic cleft for prolonged receptor binding

up/down regulation

chronic use of drugs to block or stimulate receptors can cause brain to adjust by increasing or decreasing the number of receptors (homeostasis)

neuromodulator

stimulate/facilitate other transmitters (caffeine)