Membranes and Transport

Question 1

Types of Transport

Answer 1

• Diffusion
• Osmosis
• Passive Transport
• Active Transport
• Endocytosis
• Recptor Mediated Endocytosis
• Exocytosis

Question 2

Diffusion

Answer 2

• Movement of molecules from a high concentration to a low concentration
• down a concentration gradient
• can occur in air, in liquid, or across a membrane
• small uncharged molecules
• Ex. O²and CO²

Question 3

Osmosis

Answer 3

• Specilized type of diffusion
• moves H₂0 from a high concentration to a low concentration
• moves water through Aqua Porins

Question 4

Hypertonic Solutions

Answer 4

• environment that has a higher solute level than the cells found in that solution

Question 5

Hypotonic Solutions

Answer 5

• environment that has a lower solute level than the cells found in that solution

Question 6

Isotonic Solutions

Answer 6

• environment that has the same solute level as the cells found in that solution

Question 7

Passive Transport

Answer 7

• Large or charged molecules
• Requires a protein
• moves molecules from a high concentration to a low concentration
• ex. salt, sugar, ions

Question 8

Active Transport

Answer 8

• Large or charged molecules
• Requires a protein and ATP
• moves molecules from a low concentration to a high concentration
• against the concentration gradient
• ex. salt, sugar, ions

Question 9

Endocytosis

Answer 9

• Movement of molecules into a cell in bulk
• Phagocytosis- cell eating
• Pinocytosis- cell drinking

Question 10

Receptor Mediated Endocytosis

Answer 10

• Endocytosis with receptors

Question 11

Exocytosis

Answer 11

• movement of molecules out of a cell in bulk