University of Central Florida (UCF) PCB3703C Human Physiology Exam 4 Practice

The frequency of slow waves in the stomach is indeed three per minute. Slow waves, also known as basic electrical rhythm (BER), are generated in the smooth muscle of the stomach and play a crucial role in coordinating gastric motility. They are not action potentials but rather rhythmic fluctuations in membrane potential that determine the timing of contractions.

This specific frequency of three slow waves per minute is important for the regulation of gastric emptying and digestive processes, ensuring that food is mixed with gastric secretions adequately before moving into the intestines. The slow waves help trigger action potentials when they reach a certain threshold, which subsequently leads to muscle contractions and peristalsis. Understanding this frequency is essential for comprehending how the digestive system operates in a coordinated manner.