Midterm 4 Stuff Flashcards
Stimulus
any effects on the organism ex. signal, noise
outer stimulus
from the environment (light, sound)
inner stimulus
from the organism (glucose concentration, pH of the blood)
saltatoric propagation
propagation of action potentials along myelinated axons increasing conduction velocity
Donnan equilibrium
equilibrium between 2 solutions separated by a semipermeable membrane but with non-permeable ions present
direct piezoelectric effect
electrical polarization that occurs in certain crystals upon mechanical deformation (detects ultrasound)
inverse piezoelectric effect
deformation in a crystal placed in electric field (generates ultrasound)
Doppler effect
in case of a moving ultrasound source, if the source is approaching, the frequency increases and if the source is departing the frequency decreases
time constant
time while the changing decreases or increases by the factor e
space constant
the distance, where the changing decreases by factor e
Weber fechner law
loudness level of the sound corresponding to the intensity level of the reference sound
fletcher-munson sone scale
sone values correspond to equal loudness curves AND reflect the linear pyschophysical sensation
steven’s law
describes the relationship between stimulus and sensation for each sensory process
conductive hearing loss
obstacle prevents sound from reaching inner ear
sensory-neural hearing loss
permanent damage or defects to the inner ear
