before quiz reminders

Question 1

all or nothing law

Answer 1

The all-or-nothing law is an important principle that describes how nerve cells either fire at full strength or do not depending on if threshold is reached

Question 2

 one action potential takes _ milliseconds

refractory period takes

Answer 2

5 msec

1 msec

Question 3

what happens to residual neuruotransmitters

Answer 3

they are either destroyed by enzyme named acetylcholinesterase or reabsorbed back into axon or presynaptic membrane

Question 4

Explain how inhibitory and excitant neurons work

Answer 4

Inhibitory neurons send neurotransmitters that open potassium channels to create hyperpolarization to stop the action potential creating more stimulus required while excitatory neurons open sodium channels to depolarize