What is the normal respiratory rate range for an adult?

The normal respiratory rate for an adult typically falls within the range of 12 to 20 breaths per minute. This range is considered the standard for healthy adults at rest. When looking at the answer choice indicating 16 to 20 per minute, it falls within this acceptable range and represents an average or slightly elevated respiratory rate that can occur due to various factors such as activity level, stress, or general health conditions.

In a clinical context, respiratory rates outside the normal range can indicate underlying health issues. For instance, a rate significantly below 12 could suggest respiratory depression, while a rate above 20 may indicate conditions such as anxiety or respiratory distress. Therefore, understanding normal respiratory rates is crucial for recognizing abnormal conditions in patients.