Question

1. How is an increase in stimulus strength reflected by an action potential? Draw this answer out and attach it to your post. 2. Why is the Nat/K* pump responsible for maintaining resting membrane potential? 3. Explain how repolarization happens. Give characteristics of the absolute and relative refractory periods in terms of voltage-gated sodium channel conformation. At what point can a new action potential be generated? 4. Outline a situation that would reduce the likelihood of an action potential occurring. How could you prove that experimentally? 5. What information do you need to calculate conduction velocity? How would myelination affect this value?

Answer 1

0 a cells become less & deo less negative as the strength of stimulus increases when stimulus is strong enough it depolasizes the membrane to the threshold potential at the axow. hillock & produces action potential in a sensory newson. the wonity of neuson to fire an action potential belo depends in stimulus strength t also in the stimulus duration because the neuron's membrane Potential has the integrate its input over time until it reaches the thres old potential to fire an action ability to potential 1 Increasing breamency of Action Potentials 1 same frequency of Action potentials. Action Potential lo Thresold 70 Increasing stimulus strength Time (ms) - ole

Felt great to answer. Good luck!