BMS11004 WEEK 10 - TUESDAY

Question 1

how do you measure conduction velocity on graph

Answer 1

take time interval between 2 lines for start and end of secondary response (second bump)

Question 2

what is effect of increased temperature on neurons conduction velocity

Answer 2

temp slow down diffusion, slows speed of conformational changes in v/gated channels, slow speed of AP propagation

Question 3

outline trajectories of CAP amplitude alongside stimulus intensity

Answer 3

starts small then gradually increases as stimulus intensity increase, then plateau
frequency of AP encodes stimulus

Question 4

why is CAP graded when AP are all-or-none

Answer 4

CAP is made of many individual neuron AP, each neuron has different fire stimulation threshold

Question 5

how do you analyse refractory period of CAP

Answer 5

measure max during start and end of wave followed by refractory period

Question 6

what causes neurons refractory period

Answer 6

for absolute = v/gated Na+ channels are shut
for relative = some Na+ channels are still shut

Question 7

whats equation for calculating conduction velocity

Answer 7

speed = distance/time