Regulation of fluid and electrolyte balance and acid based balance depends on the

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?