Answers to Last Week's Questions

A motor impulse from the cerebral cortex to the left quadriceps synapses on ventral horn cells in the spinal cord. True

Clinical Relevance: Cell bodies of lower motor neurons innervating voluntary muscle are found in the ventral horn. Disease of these cells e.g., poliomyelitis causes paralysis of voluntary muscle.

In adults the right main-stem bronchus is steeper than the left. True

Clinical relevance: Inhaled foreign bodies more often pass into the right main bronchus.