What is one respiratory effect of parasympathetic stimulation?

Parasympathetic stimulation is primarily associated with rest-and-digest functions in the body and involves the activation of the vagus nerve. One of the key effects of this stimulation in the respiratory system is increased mucus production. The vagus nerve stimulates the goblet cells in the airways, leading to an enhanced secretion of mucus. This mucus plays an important role in trapping pathogens and particulate matter, thus helping to maintain airway health.

Bronchodilation, on the other hand, is largely a function of sympathetic stimulation, which relaxes the smooth muscles of the airways. Increased oxygen uptake is not directly influenced by parasympathetic activity but rather relates to overall respiratory demand and efficiency. Reduced respiratory rate could be associated with relaxation and calming effects, but it does not encapsulate the specific respiratory effects attributed to parasympathetic stimulation, which focuses more on enhancing mucus secretion and maintaining airway clearance.