Describe how the phospholipids of a plasma membrane regulate the movement of large or polar molecules across the membrane. Explain how osmosis will affect animal cells when the cells are placed into an environment with a low water potential (high solute concentration) compared to the intracellular water potential.

The plasma membrane is selectively permeable. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.

Explanation:

Phospholipid plasma membrane is semipermeable, only hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot.Large or polar molecules can diffuse across the membrane via Integral membrane proteins by active or passive transport mainly by facilitated diffusion.

Osmosis is the passive movement of water molecules from a region of lower solute concentration to a region of higher solute concentration.When the cells are placed into an environment with a low water potential (high solute concentration) compared to the intracellular water potential  it will shrivel—making the cytoplasm dense and its contents concentrated—and may die.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

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