2. In the emergency room, Reagan’s heart rate was higher than normal to compensate for his blood loss. Which of the characteristics of living things does this change represent?

Irritability

Explanation:

Irritability is one of the characteristics of living things, which involves the ability to respond to certain changes that can alter the homeostatic nature of a living system. This change is called STIMULUS. Hence, the body of a living things responds to a stimulus in order to maintain a stable internal state i.e. homeostasis.

In this case of Reagan whose heart rate increased (than normal) in order to compensate for his blood loss, the response of heart rate increase was due to the loss of blood. Hence, this is an example of IRRITABILITY as a characteristics.

no, because those are both different running competitions. while distance runners train their legs and their lungs to run long amounts of time, the sprinters are training their legs and their lungs to give all they have in the little amount of area they need to cover. the brain also plays a huge part in all of this.

the brain is the only thing in your body that sends messages to your body telling you to run. if you are a long distance runner and you have the mind set of a sprinter, you will not get anywhere. if you have a long distance mind set and you have to run 200m in 20 seconds then you will not make it in time.