Final answer:
The sympathetic division of the ANS is responsible for increasing GSR, heart rate, and BPM, commonly known as the 'fight-or-flight' response.
Step-by-step explanation:
The division of the Autonomic Nervous System (ANS) responsible for an increase in Galvanic Skin Response (GSR), heart rate, and Beats Per Minute (BPM) is the sympathetic division. The sympathetic division prepares the body to deal with emergencies or stressful situations, often referred to as the 'fight-or-flight' response. This response involves an increased heart rate, dilation of air passages in the lungs, more blood flow to the skeletal muscles, and a reduction in blood flow to the digestive system. In contrast, the parasympathetic division is associated with the 'rest and digest' state where it returns the body to homeostasis after the emergency has passed and manages the body's restful functions.