Communication between cells, Muscle Contraction, RP and AP Flashcards
Actin and Myosin
proteins responsible for muscle contraction
Filament
Thin fiber out of proteins
myofibril
unit of a muscle fiber made up of sacromeres
myoglobin
ion-contraining oxygen binging protein molecule
phosphorylation
phosphate group in an organic molecule
plateau
AP of heart where membrane potential is constant
sarcolemma
membrane of muscle fiber
sacromere
membrane between 2 z-lines
sarcoplasm
cytoplasm of muscle fiber
tetanic contraction
uninterrupted muscular contraction caused by high frequency motor impulse
collateral process
branches of an axon terminating in locations other than the major target location
dentrite
main receptive area for synaptic input
donnan equilibrium
electrochemical equilibrium in a solution separated by a semipermeable membrane
Goldmann-Hodkin-Katz equation
description of membrane potential based on diffusible ions na+ k+ cl-
hyperpolarisation
a shift of resting potential towards more negative values
time constant
time required for an externally induced potential change in the membrane
internode
space along a myelinated axon that is covered by a myelinating glial cell
bipolar neuron
neuron with two processes fulfilling the same function
cAMP
cyclic adenosine momophosphate, signaling molecule
colocalization
presence of 2 transmitter molecules and a neuromodulator in the same synaptic vesicle
decremental transmission=electrotonic transmission
electrical signal that decreases over space
effector protein
protein transmitting the effect of G-protein activation in the cell
faciliation
temporal increase of synaptic efficiency due to preceding activation of that synapse
G-Protein
GTP-binding protein at inner surface of plasma membrane, critical role in signal transmission
long term potention
long increase elf efficacy following strong stimulation in CNS
multipolar neuron
nerve cell with many processes
posttetanic potention
presynaptic stimulation at a high frequency
projection neuron
long axon running to remote targets
quantal release
transmitter are released in small packages
second messanger
molecule who’s concentration changes when signal arrives at the membrane
unipolar neuron
neuron with only one process
pseudounipolar neuron
unipolar neuron that branches near the cell body forming 2 neurits
