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.

Which of the following is not a method by which the effects of neurotransmitters are terminated?

a. Reuptake into the presynaptic neuron

b. Diffusion away from the synaptic cleft and uptake by glial cells

c. Movement back to the cell body by retrograde axonal transport

d. Degradation by enzymes in the synaptic cleft

A ________ is characterized by multiple input neurons synapsing on one postsynaptic neuron.

a. diverging circuit

b. discharge zone

c. facilitation zone

d. converging circuit

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

a. An excitatory postsynaptic potential is caused by K+ or Cl− channels opening in the membrane of the postsynaptic neuron.

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

b. Postsynaptic potentials may summate by spatial summation in which multiple neurons fire onto a single postsynaptic neuron.

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?