Which elements combine to form carbohydrates? A. Carbon, Hydrogen, and Oxygen
B. Carbon, Nitrogen, and Oxygen
C. Carbon, Calcium, and Hydrogen
D. Carbon, Potassium, and Calcium

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Which chemical equation is unbalanced? which chemical equation is unbalanced

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from