BIO SCI E109 MODULE 2 QUESTIONS AND 100% CORRECT ANSWERS

BIO SCI E109 MODULE 2 QUESTIONS
AND 100% CORRECT ANSWERS



\.what are excitable tissues? - ANSWERS✔-transmit electrical current



\.what are the types of excitable tissues? - ANSWERS✔-nervous and muscle


\.t/f: electrochemical gradient creates differences in concentrations of ions. -
ANSWERS✔-true


\.do electromotive force and chemical diffusion act in the opposite direction? -
ANSWERS✔-yes


\.t/f: concentration of ions across a membrane are augmented by active transport
of ions. - ANSWERS✔-true



\.What does voltage measure? - ANSWERS✔-measures the electromotive force
required to create separate of charge



\.what is the membrane potential (Vm)? - ANSWERS✔-the voltage across a cellular
membrane

, \.what is the equilibrium potential? (Eion) - ANSWERS✔-membrane potential from
one ion type



\.what is the nernst equation? - ANSWERS✔-



\.what is the goldman-hodgkin-katz equation? - ANSWERS✔-



\.t/f: at rest, Pk+= 40 Pna+ - ANSWERS✔-true



\.how does the goldman equation show membrane potential? - ANSWERS✔-
permeability dictates how close the membrane potential is to the equilibrium
potential of an ion, comprehension of membrane potential at a given time.



\.how does the nernst equation show membrane potential? - ANSWERS✔-
concentration difference and charge of an ion determine equilibrium potential,
determines how influential an ion can be


\.T/F: an increase in permeability of Na+ causes the membrane potential to
approach the equilibrium potential of Na+. - ANSWERS✔-True



\.what are the three gated ion-channels? - ANSWERS✔-ligand-gated,
mechanically-gated, and voltage-gated