What is another term for gut sounds that indicates bowel activity?

Borborygmus is the correct term for the sounds produced by the movement of fluid and gas in the intestines, which indicates normal bowel activity. These sounds are often audible to the patient or during an examination and can signify digestion and the movement of contents through the gastrointestinal tract. This physiological process is crucial for understanding digestive health and can provide insights into a patient's gastrointestinal function.

The other terms provided refer to different systems or functions in the body. For example, bronchial sounds pertain to the respiratory system and involve breathing patterns, cardiac sounds relate to heart activity, and renal sounds would be associated with the kidneys or urinary function. Therefore, borborygmus specifically describes gastrointestinal activity, making it the only suitable term in this context.