In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: Don notices that the patient's heart is expelling less blood with each stroke. The patient's heart has to beat _____ often to maintain consistent blood flow. 
 Answer: more
[EX A]: When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow.

[EX Q]: Question: If Milo's country begins decreasing the size of its population, what happens to its growth rate? 
 Answer: it decreases
[EX A]: With exponential growth, the population starts out growing slowly. As population size increases, the growth rate also increases.

[EX Q]: Question: Wendy is 30 years old while Jefferson is 60 years old. Who is less susceptible to disease? 
 Answer: Wendy
[EX A]:
Many diseases become more common as people grow older.