Which of the following is responsible for the increased heart beat of a boy who saw a python? increased production of

The increased heart rate of a boy who saw a python is due to the production of adrenaline. Adrenaline is a hormone released by the adrenal gland in response to stress, fear or danger. It prepares the body for a "fight or flight" response, which involves increased heart rate, blood pressure, and breathing rate, as well as the release of glucose from energy stores in the body. These physiological changes help the body to deal with a perceived threat or danger. In this case, the boy's body is preparing to either fight the python or flee from it, and the release of adrenaline is helping to facilitate this response.