As you start working out, you notice that your heart rate and breathing rate start to increase. which division of your nervous system is generating this response? be as specific as possible. as you start working out, you notice that your heart rate and breathing rate start to increase. which division of your nervous system is generating this response? be as specific as possible. the parasympathetic division of the autonomic nervous system the sympathetic division of the autonomic nervous system the somatic nervous system the afferent division of the nervous system.