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39 Cards in this Set

  • Front
  • Back
Characteristic of Brain. Different Localized areas of the brain serve different functions and are interconnected in ways to produced a output of a given system.
Characteristic of Brain. Given function served by brain is rarely produced by only one system, instead multiple modules can serve similar functions in different areas
Characteristic of Brain. Cells can take multiple inputs and create an output from those inputs
Integration of Inputs
Characteristic of Brain. All parts of system are controlled to produce an outputwithin a narrow range of possible outputs
Characteristic of Brain. The concept that the nervous system has several layers of control over most processes. Tiered structure.
Characteristic of Brain. The concept that the components of the nervous system can change functionality with experience and often maintain those cannes throughout the lifetime. Brain is always chagning and never the same.
The belief that all behavior, sensation and all thought is caused by activity in the nervous system
Materialistic Monists
Consists of brain an spinal cord
The Central Nervous System
consists of the nerves that ocnnect the brain and spinal cord to the muscles skin, internal organs.
The Peripheral Nervous System
Order of the Brain's Major Components
larger in more intelligent species, responsible for cognitive fuctions
cerebrum, cerebral cortex
responsible for vegatative functions like breathing, sleeping, heart rate
brain stem: midbrain, pons, medulla
fluid filled cavaties within the brain
stain that stains the soma of cells
crestyl violet stain
stain that stains the thick layers of membrane which surround many of the long processes present in nerves
weil stain
stain that stains the entire cell, stains 1/100 neurons
golgi stain
the cell body
short branching off the soma
long unbranched structure extending away from the soma
axons connecting the brain and sensory organs or muscles. in the PNS
Cranial Nerves
axons connecting the spinal cord and the muscles or sensory organs. in the PNS
spinal nerves
groups of axons connecting one nucleus to another in the brain and spinal cord (the CNS)
signals carried along axons
action potential
property of APs: they remain same intensity along axon
property of APs: in order for an AP to fire an AP, the stimulus must reach a certain threshold point, subthreshold stimulus will result in nothing, any supra will always result in the same AP
all or nothing
property of APs: domino like propagation, fire in succession
segments of axon
cells normal -40mv to -90mv status
resting potential
caused by the firing of an AP in the neighboring segment
Stimulus that causes AP to fire
Stimulus >6.4
knobs that occur where the fine branches of the end of the axon are next to the soma/dendrites of another neuron
synaptic knobs/terminals
the synaptic knob and area along post synaptic membrane comined
the gap between presynaptic terminal and postsynaptic membrane
synaptic cleft
small circular profiles located in synaptic terminal. hold NTs.
synaptic knob
the thick area along the postsynaptic membrane
postsynaptic density
short period of time after an AP passes where another AP cannot pass through. Result: AP's can't travel backwards.
refractory period
this happens when intracellular negative potential made LESS negative by 5 or 10mv and NOTHING HAPPENS
subthreshold depolarization
this happens when intracellular negative potential made LESS negative by >25mv and an AP is fired
suprathreshold depolarization
process of filling a microelectrobe with a suspeted NT. suspected NT are then ejected from the microelectrode by pressure or applying a current. Result: releasing very small amounts of NST
chemicals located inside the synaptic vessicles. Can excite or inhibit a postsynaptic cell