During a neurobiology lecture, a professor repeatedly refers to group A and group B fibers, absolute refractory period, and myelin sheath gaps. Define these terms.

Mark the following statements as true or false. If a statement if false, correct it to make a true statement.

c. An inhibitory postsynaptic potential causes the membrane potential of the postsynaptic neuron to approach threshold.

Mark the following statements as true or false. If a statement if false, correct it to make a true statement.

d. Spatial summation can combine two EPSPs, two IPSPs, or an EPSP and an IPSP.

Explain how an action potential is propagated down an axon in continuous conduction. Why is saltatory conduction faster than continuous conduction?

In unmyelinated axons, action potentials are propagated by_________ conduction.

Dr. Roberts is testing a new drug that blocks sodium channels in the axons of a neuron. Which of the following statements is correct?