_occurs when ventricular blood volume does not change during
relaxation of the ventricles due to all four valves being closed.

Isovolumetric Phase

Explanation:

Heart contraction presents various phases that depend on the volume of blood and pressure present in each chamber. From these variables, one can plot blood volume vs pressure in an x and y axis.

This question describes a phase where all valves are closed and no changes in blood volume is present. This occurs during two parts of the heart cycle called isovolumetric (iso-: same, -volumetric: volume) phase, which can be seen during contraction and relaxation. This phenomen is due to the pressure gradients the ventricle has to overcome to open the valves.

elevated levels of blood glucose (hyperglycemia) lead to spillage of glucose into the urine, hence the term sweet urine.