Physiology - Resting membrane potential Flashcards
a tendency to have recurrent seizures is known as..
epilepsy
a seizure is..
a. lack of electrical activity in the brain
b. sudden burst of intense electrical activity
b.sudden burst of intense electrical activity
acute kidney failure, chronic kidney disease and type 1 diabetes can all cause
a. hypokalaemia
b. hyperkalaemia
c. hyponaturia
d. hypernaturia
b.hyperkalaemia
weakness, arrhythmias, paralysis, muscle fatigue and nausea are associated with..
epilepsy
what type of diabetes can cause hyperkalaemia
a. 1
b. 2
a.1
what are excitable cells
cells capable of generating self propagating electrical signals
what is the resting membrane potential
a. -55 mV
b. -70 mV
c. -80 mV
d. +70 mV
b.-70 mV
which is true for inside the cell compared to outside
a. higher sodium
b. lower potassium
c. lower sodium
c.lower sodium
which ion has most contribution to resting membrane potential?
a. na
b. k
c. fe
d. ca
b. k
what is diffusion potential caused by
a. moveent of K+ out the cell via leak channels
b. voltage gradient opposing further k+ diffusion out
a.moveent of K+ out the cell via leak channels
diffusion potential increases until..
a. higher than voltage gradient
b. lower than voltage gradient
c. equilibrium reached
d. equilibrium breached
c. equilibrium reached
the potential difference when conc gradient and voltage gradient are in eqm are known as..
equilibrium potential for K+
Ek
what equation is used to find Ek
a. faradays
b. ficks
c. nernst
c.nernst
what is the membrane more permeable to
a. potassium
b. sodium
a.potassium
what pd is the ENa (eqm for Na)
a. -65 mV
b. -70 mV
c. -80 mV
d. +70 mV
a.-65 mV
