It's a odd question but are there any other colors in the world that we can't see?

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

The body is protected against harmful flu viruses by

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass