Which part of the intrinsic conduction system normally initiates the depolarizing impulse that causes a heartbeat?

Asap during the past few weeks or months, have you noticed any exercises that have become too easy for you? do you think you need to increase the intensity in any of the three exercise areas in your workouts? evaluate your exercise progress in the three exercise areas (cardiovascular, resistance, and flexibility) and list what modifications, if any, you may need to make in your exercise routine.

Which of these choices is not a cultural influence on our wellness? a. attitude b. behavior c. hereditary diseases d. media

Histamines are an important chemical in the body. what is their purpose in the immune system?