Question

George is running a 5-km race and his cells need more oxygen. Which change will help his body meet the increased demand for oxygen?
A. His heart beating more quickly.
B. His breathing becoming more shallow.
C. His pancreas releasing more insulin..
D. His sweat glands becoming more active

Answer 1

A his heart Beating more quickly. Besting faster means oxygen is Ferried through the body faster.

Answer 2

k thant's what I thought...

Answer 3

No prob! Thanks!

Answer 4

you welcome