B4.7 Osmosis

Question 1

Define osmosis

Answer 1

Movement of water across a partially permeable membrane from an area of high water concentration (dilute solution) to an area of low water concentration (conentrated solution).

Question 2

The cell membrane has tiny holes called __________.

Answer 2

Pores

Question 3

Define partially permeable membrane

Answer 3

Membrane that has small pores through which small molecules such as water can pass, but not larger molecules such as proteins

Question 4

Water can move in or out of cells by ___________.

Answer 4

Osmosis

Question 5

When plant cells take up water by osmosis, the cells become ________. The cell contents push against the ___________ cell wall.

Answer 5

1. Firm

2. Inelastic