Question

Answer the following questions in complete sentences.

1. To facilitate transport, the plasma membrane of a cell is selectively permeable. Define this term.
2. What is a solution? Describe and give examples of the two major components of solutions.
3. Explain concentration and concentration gradient.
4. Define diffusion and osmosis.
5. Compare and contrast diffusion and osmosis. Give at least 2 differences and 2 similarities.

Answer 1

Answer : 1.Facilitated Transport is a Selective transport of molecules that cannot cross the membrane on their own with the aid of a membrane protein.

Answer : 2.A solution is a homogeneous mixture. In a homogeneous mixture, the dissolved particles are spread evenly through the mixture. The particles of the solution are also too small to be seen or to settle out of the mixture.

All solutions have two parts: the solute and the solvent. The solute is the substance that dissolves, and the solvent is the substance that dissolves the solute.

Answer :3. concentration is the amount of solute particle present in the solution but concentration gradient difference from one concentration substance from one location to another

Answer4.

Diffusion is the Spreading out of molecules across a cell membrane until they are equally concentrated.

Osmosis is the Diffusion of H2O molecules through a semipermeable membrane from greater to lower concentration.

Answer 5.: Similarities

• both involve movement of substances from regions of high concentration to low concentration
• both travel down a gradient
• both don't require energy (passive transport )

Differences

•diffusion =movement of any substance, osmosis = only water
• osmosis refers to movement across membrane, diffusion doesn't need a membrane.

Thanks dear student