Heterotrophs take in mass in the form of food. food is either used to build molecules within the body or as fuel for cellular respiration. if used for cellular respiration, this mass will eventually be converted into carbon dioxide, and
a) oxygen, water
b) oxygen, glucose
c) water, energy (atp)
d) carbon monoxide, glucose

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.