passive transport

Question 1

passive transport

Answer 1

movement of molecules in biological systems that does not require the use of energy

Question 2

dynamic equilibrium

Answer 2

equal concentrations
of all solutes across all membranes

Question 3

simple diffusion

Answer 3

ability of substances to move across a
membrane unassisted

Question 4

facilitated diffusion

Answer 4

Occurs if the rate of simple diffusion is too slow or if the cell needs ions and large, polar molecules
diffusion of these molecules across a membrane occurs with the help of transmembrane proteins called transport proteins.

Question 5

channel proteins

Answer 5

a hydrophilic pathway that allows water and ions to pass through the membrane.

Question 6

carrier proteins

Answer 6

a protein that binds to a specific solute and transports it across the lipid bilayer

Question 7

what is osmosis

Answer 7

diffusion of water across a semi-permeable
membrane.

Question 8

hypotonic solutions

Answer 8

solution has less solute, and more water
an example is swelling

Question 9

hypertonic solutions

Answer 9

solution has more solute, and less water
an example is dehydration

Question 10

isotonic solutions

Answer 10

equal solute, equal water
an example is organ transport