Graded Potentials

Question 0

NT Release tends to be

Answer 0

graded

vs. fixed amounts typically released by AP

Question 1

Graded Potentials

Answer 1

• releasing NT from a Neuron does NOT always require an Action Potential
• can vary in amplitude in proportion to the input stimulus
  • i.e. react a lot to strong stimulus, less to weak one

Question 2

Some neurons are very small, have short or even no Axon or Dendrites

Answer 2

• called LOCAL NEURONS, these cells communicate only with immediately adjacent cells
• in these Neurons, extremely rapid Electrical Conduction can cause NT release
• since cells are so small, Electrical Conduction need not travel far, does not completely degrade

Question 3

Some Receptor cells…

Answer 3

… react to outside stimulus (light, sound) w/graded potential

e.g. in Retina, Cochlea