What maintains the permanent thermocline found at all low and mid-latitudes? a. Downwelling
b. Density stratification
c. Warm water currents
d. Cold water currents
e. Continual upwelling

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

If a grape were placed in a hypertonic solution what would happen and why?

Compare and contrast your sells take in oxygen, water, and food. what is one waste product that leaves your cells?