What is cyclic about the reactions that make up the krebs cycle?
a. the molecules that start the reaction are circular.
b. the molecules that end the reaction are circular.
c. the first reactant and last product are the same.
d. the reactions start without any outside energy.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

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

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.