Osmosis+ Active Transport

Question 1

osmosis

Answer 1

the diffusion of water molecules across a semi-permeable membrane

Question 2

semi-permeable membrane

Answer 2

tiny holes, only allowing small molecules in and out of a cell

Question 3

dilute solution

Answer 3

concentration of water molecules is greater than the concentration of solute molecules

Question 4

concentrated solution

Answer 4

concentration of solute molecules is greater than the concentration of water molecules

Question 5

hypotonic

Answer 5

concentration of solute is greater inside than outside a cell

Question 6

isotonic

Answer 6

concentration of solute outside a cell is equal to the inside of a cell

Question 7

hypertonic

Answer 7

concentration of solute is greater outside than inside a cell

Question 8

turgid

Answer 8

water enters a cell, causing the cell wall to swell

Question 9

plasmolysed

Answer 9

water leaves a cell, causing for the cell’s contents to shrink and the cell membrane to pull away from the cell wall

Question 10

practical

Answer 10

dry potato skins, weigh, different sucrose solution concentrations, 30 mins, weigh dried

Question 11

what is needed for active transport?

Answer 11

semi-permeable membrane, membrane with a carrier protein, energy

Question 12

active transport

Answer 12

movement of dissolved substances against a concentration gradient