Lab 5 Flashcards
what is a CAP ( compound action potential)
The sum of all action potentials in many axons traveling within the same nerve
T/F each myocyte in a muscle have similar properties
F, they have diff properties
Equation for CAP
CAP = AP_n
how do we record CAP
extracellular electrodes
define NMJ
chemically transmitting synapse
what nerve is being looked at in this lab
sciatic gastrocnemius
synaptic facilitation
when the second muscle contraction is stronger than the first
synaptic depression
when the second muscle contraction is weaker than the first muscle contraction
how do we measure the contraction of the muscle
force transducer
define synaptic delay
time required for action potential evoked NT release at the nerve terminal to be transduced into a membrane potential change is PS cell
Motor axon AP is propagated along ____ and triggers ______ release at ____ producing a ______. In turn, muscle AP is ______ and spread along a _____
nerve
ACh
NMJ
PSP
activated
muscle
excitation contraction coupling refers to
mechanism by which a muscle potential is transduced into a mechanical shortening (contraction) of the muscle fibers
excitation-contraction coupling time
time required for transduction mechanism to occur
T/F The time from muscle excitation to the onset of tension is the latent period.
T
Muscle excitation causes __________ release from intracellular stores.
mechanically-mediated calcium
