experiment if you fill a balloon the size of a golf ball tie a knot in the end. mix plaster of paris powder with water put ballon one third the way in plaster let set after it has set then freeze what will hahen to the balloonpowder with water untilthick press balloon in center one third of ballon should below the surface let set then place containeru

blue

light-years

magnitude

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

its probably to later but whats the question

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.