Heart rate,blood pressure,and blood sugar levels are increased in times of emergency by

A) the parasympathetic nervous system.
B) the sympathetic nervous system.
C) the immune system.
D) glucose.

The sympathetic nervous system is responsible for the fight or flight response during emergencies and triggers an increase in heart rate, blood pressure, and blood sugar levels to prepare the body for action. The parasympathetic nervous system works to counteract this response and restore the body to its normal state. The immune system plays a different role in response to infections and diseases. Glucose is a source of energy for the body and is regulated by hormones such as insulin and glucagon.