Chapter 12

1. Which division of the nervous system would carry information to the smooth muscle of the gastrointestinal tract?

• ´Visceral sensory tracts

• ´Visceral motor tracts

• ´Somatic motor tracts

• ´Somatic sensory tracts

Which glial cell produces myelin around axons in the central nervous system?

• ´Microglia

• ´Oligodendrocyte

• ´Schwann cell

• ´Satellite cell

When the plasma membrane voltage of an axon goes from +35 to -70 mV, what process occurred and which ion is involved?

• Repolarization (Na+ ions into the cell)

• ´Depolarization (K+ ions into the cell)

• ´Repolarization (K+ out of the cell)

• ´Depolarization (Na+ ions out of the cell)

A neurotransmitter, such as Acetylcholine, is stored in and released from which part of the neuron?

• ´Dendrites

• Synaptic knob

• ´Axon hillock

• ´Synaptic cleft

5. Which of the following would have the fastest conduction of an action potential down the axon?

• Large diameter, myelinated

• . Small diameter, unmyelinated

• ´Large diameter, unmyelinated

• ´Small diameter, myelinated