Explanation:
How Age and Exercise Affect Your Max Heart Rate. The relationship between the heart and exercise has been studied for more than six decades and the research is clear: Max heart rate—the highest heart rate you can safely hit during exercise—decreases with age regardless of lifestyle or level of fitness.
Answer:
The autonomic nervous system
Explanation:
The autonomic nervous system is control mechanism that operates mainly unconciously and governs body functions like heart rate, digestion, pupil response, urination, sexual excitement, and respiratory rate.
Autonomic functions require respiratory control, cardiovascular control, vasomotor activity and some reflex behaviors like coughing, swallowing, vomiting and sneezing
Drugs are not a topic to be thinking about, I VERY MUCH WORRY YOU ARE ASKING NOT BECAUSE OF SCHOOL!!!
Answer:
a change from one day to the next day
