Final answer:
The normal respiration rate for adults is 12-20 breaths per minute. This rate is controlled by the respiratory center in the brain and is an important indicator of disease.
Step-by-step explanation:
The normal respiration rate for adults is generally accepted as 12-20 breaths per minute. This rate can vary based on a number of factors, including age and activity level. The respiratory rate can change and can be an important indicator of disease; it may increase or decrease during an illness or in a disease condition. The primary control for respiratory rate is the respiratory center which is located within the medulla oblongata in the brain. This center responds to changes in carbon dioxide, oxygen, and pH levels in the blood to regulate breathing.