Asample of 5 persons with hypertension underwent a special treatment program which resulted in the following reductions in systolic blood pressure for these persons: -5, 10, 20, 5, 10. the mean reduction in systolic blood pressure is:

answer; both surfaces of the membrane are nonpermeable

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.