Deshawn is studying homeostasis and circulation. to organte his findings, he constructs two models of the human heart, veins, and arteries
one to representa non smoker and one that includes attributes typically found in a smoker dy comparing the two models, which relationship of
cause and effect can deshawn best explain
a
contractions of the heart move blood through the circulatory system
b
smoking causes changes to homeostasis throughout the body
c
smoking damages the function of the circulatory system
d. blood flows in one direction only through the circulatory system

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.