Passive Transport (Unit 1)

Question 1

Passive Transport

Answer 1

Movement of substances across a membrane without using chemical energy.
Move along concentration gradient, from high to low.
Will continue to move until reach dynamic equilibrium.

Question 2

3 Factors that Affect what moves across a membrane

Answer 2

Size, Polarity, Concentration

Question 3

Ways to Move Substances Across a Membrane

Answer 3

Simple Diffusion
Facilitated Diffusion with Channel Protein
Facilitated Diffusion with Carrier Protein
Osmosis

Question 4

Simple Diffusion

Answer 4

Molecules pass through bilipid layer.

Small polar or non-polar molecules

Question 5

Facilitated Diffusion with a Channel Protein

Answer 5

Forms hydrophobic pathways for ions to travel through.

Ions

Question 6

Facilitated Diffusion with a Carrier Protein

Answer 6

Binds to a Specific solute and transports it across the bilayer.
Glucose, amino acids.

Question 7

Osmosis

Answer 7

Water molecules pass directly through the lipid bilayer, or through a pore. Water moves from high to low concentration.

Question 8

Concentration Types

Answer 8

Hypotonic Solution, Isotonic Solution, Hypertonic Solution

Question 9

Hypotonic SOlution

Answer 9

Less solute outside the cell. Water concentration is lower inside the cell.
Water enters the cell

Question 10

Isotonic Solution

Answer 10

Same amount of solute inside and outside the cell, so water concentration is equal inside and out. Movement is that of dynamic equilibrium.

Question 11

Hypertonic Solution

Answer 11

More solute outside the cell, so water concentration is higher inside the cell. Water leaves the cell.