Which of the following responses is NOT caused by activation of the sympathetic division?

• A. Relaxation of airways
• B. Increased heart rate
• C. Dilation of pupils
• D. Increased digestive activity

Answer: (D)

Verified step by step guidance

1. Understand the role of the sympathetic division of the autonomic nervous system, which is responsible for the 'fight or flight' response, preparing the body for stressful or emergency situations.
2. Identify the typical physiological responses associated with sympathetic activation, such as increased heart rate, dilation of pupils, and relaxation of airways to enhance oxygen intake.
3. Recognize that the sympathetic division generally decreases non-essential functions during stress, such as digestive activity, to prioritize energy and resources for immediate survival needs.
4. Analyze each option: Relaxation of airways, Increased heart rate, and Dilation of pupils are all consistent with sympathetic activation, as they prepare the body for rapid action.
5. Conclude that Increased digestive activity is NOT a response caused by sympathetic activation, as it is contrary to the typical reduction in digestive processes during the 'fight or flight' response.