You must be at least 17 years old to donate to the general blood supply, or 16 years old with parental/guardian consent, if allowed by state law. Learn more about the reasons for a lower age limit.
Other Causes of Elevated Heart Rate. Elevated heart rate when sick is actually your heartâs aid in order to quell the sickness. However, there can be other causes for elevated heart rate as well. Electrical signals produced and sent to the heart tissues are responsible for controlling the heart rate.
Yes, your heart rate increases when you are in pain, so when you hit your head then alot of blood rushes toward it, therefore making your heart beat faster and make your heart â¦ rate go up.2 people found this useful.es, it does make your heart rate increase because spicy food increases metabolism in your body and also amount of heat in your body causes blood to circulate faster, therefor â¦ e heart rate increases.