Question

complete the table to compare the three types of passive transport. structure and function of the cell membrane (96) molecules cross the membrane through the phospholipids molecules cross the membrane through proteins molecules move down their concentration gradient molecules move without using cellular energy osmosis simple diffusion facilitated diffusion not feeling ready yet? this can help: work it out get 5 of 6 correct challenge stage 2 of 2 hr min sec 00 06 35 time elapsed 17 questions answered

Explanation:

Step1: Define osmosis

Osmosis is the diffusion of water across a semi - permeable membrane. Water moves through aquaporin proteins (a type of protein), down its concentration gradient, and without using cellular energy. It does not cross through the phospholipids directly.

Step2: Define simple diffusion

Simple diffusion is the movement of small, non - polar molecules (like oxygen and carbon dioxide) directly through the phospholipid bilayer of the cell membrane, down their concentration gradient, without the use of energy or proteins.

Step3: Define facilitated diffusion

Facilitated diffusion involves the movement of larger or polar molecules (such as glucose or ions) across the membrane through specific transport proteins (carrier or channel proteins), down their concentration gradient, and without the use of cellular energy.

Answer:

	Osmosis	Simple Diffusion	Facilitated Diffusion
Molecules cross the membrane through proteins	Yes	No	Yes
Molecules move down their concentration gradient	Yes	Yes	Yes
Molecules move without using cellular energy	Yes	Yes	Yes