movement into and out of cells

Question 1

diffusion

Answer 1

net movement
of particles from a region of their higher
concentration to a region of their lower
concentration

Question 2

where does the energy for diffusion come from

Answer 2

comes from
the kinetic energy of random movement of
molecules and ions

Question 3

osmosis

Answer 3

the net movement of water molecules from a region of higher water potential (dilute solution) to a region of lower water potential (concentrated solution), through
a partially permeable membrane

Question 4

how are plants supported

Answer 4

by the pressure of water inside the cells pressing outwards on the cell wall

Question 5

hypertonic

Answer 5

more solute than water, shrinks

Question 6

hypotonic

Answer 6

more water than solute, swollen

Question 7

isotonic

Answer 7

balanced, water and solute

Question 8

active transport

Answer 8

the movement of particles through a cell membrane from a region of lower concentration to a region of higher
concentration (i.e. against a concentration
gradient), using energy from respiration

Question 9

importance of active transport

Answer 9

process for movement of molecules or ions
across membranes, including ion uptake by root hairs