Jam with Confidence: Rock Your Certified Rhythm Analysis Technician Exam 2026!

The statement that the autonomic nervous system (ANS) is involuntary and that the sympathetic division increases heart rate is accurate. The autonomic nervous system is responsible for regulating bodily functions that occur without conscious effort, such as heart rate, digestion, and respiratory rate. This means that the ANS operates involuntarily, managing automatic bodily functions seamlessly in response to various physiological demands.

Within the ANS, there are two main divisions: the sympathetic and parasympathetic divisions. The sympathetic division is often referred to as the "fight or flight" system, which activates the body’s resources to respond to stressful situations. One of the key effects of sympathetic activation is the increase in heart rate, allowing for enhanced blood flow and oxygen delivery to muscles during times of stress or physical activity.

In contrast, the parasympathetic division is known for its calming effects, often referred to as the "rest and digest" system, which decreases heart rate among other restorative functions. This division helps the body conserve energy and promotes relaxation.

Thus, the correct choice appropriately reflects the involuntary nature of the ANS and accurately describes the role of the sympathetic division in increasing heart rate.