9.2

Question 1

What is simple diffusion?

Answer 1

Diffusion across the membrane that requires no help, it can be done by small, nonpolar molecules.

Question 2

What is facilitated diffusion?

Answer 2

Diffusion through the membrane with the help of proteins, small, polar molecules can cross.

Question 3

What do hypertonic, isotonic, and hypotonic mean?

Answer 3

Hypertonic is when something has more solutes than something else, vice versa for hypotonic, isotonic is when both have the same number of solutes.

Question 4

What is active transport?

Answer 4

Forcing small molecules across the membrane from a low side to a high side.

Question 5

What is endocytosis?

Answer 5

Vesicles transporting larger molecules into the cell.

Question 6

What is exocytosis?

Answer 6

Vesicles transporting larger molecules out of the cell.

Question 7

What is the importance of the surface area:volume ratio?

Answer 7

The surface area should be maximized and the volume should be minimized because diffusion only works well over short distances.

Question 8

Which way will solutes diffuse across a membrane?

Answer 8

The solutes would move randomly so likely half the solutes will end up on both sides.

Question 9

Which way will water diffuse across a membrane?

Answer 9

Water will diffuse towards where there are more solutes.