Both photosynthesis and cellular respiration make use of a proton gradient. Imagine that, somehow, there were an equal number of protons on both sides of the membrane. How would this affect the formation of ATP in both processes? Explain.

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

How will you manage your time to accomplish the necessary tasks both on the job and at home?

Which organelle plays a role in intracellular digestion?