06: Movement Through Membranes

Question 1

Plasma Membrane

Answer 1

• Functions as a gateway through which chemical substances and small particles may enter or leave a cell

Question 2

Selective Permeable

Answer 2

• Allows only certain substances to easily pass through it.

Question 3

Passive Process

Answer 3

• Diffusion.
• Osmosis.
• Filtration.
• Does not require the cellular energy of ATP
  
  • occur due to molecular motion or hydrostatic pressure

Question 4

Active Process

Answer 4

• Active transport.
• Phagocytosis.
• Pinocytosis.
• Utilizes ATP

Question 5

Osmosis

Answer 5

• A special case of passive membrane passage.
• Occurs when water molecules diffuse through a selectively permeable membrane from an area of higher water concentration toward an area of lower water concentration.

Question 6

Tonicity

Answer 6

• The osmotic pressure of a solution in a relation to a cell.

Question 7

Isotonic

Answer 7

• The osmotic pressure is the same as the cell.

Question 8

Hypertonic Solution

Answer 8

• Higher concentration of solutes than the cell.

Question 9

Hypotonic Solution

Answer 9

• Lower concentration of solutes than in the cell.
• Swelling of cell

Question 10

Filtration

Answer 10

• The movement of water and solutes through a selectively permeable membrane by hydrostatic pressure upon the membrane.

Question 11

Diffusion

Question 12

Rate of Diffusion