Working Cell

Question 1

Membrane Structure

Answer 1

Lipid bilayer w/ proteins

Question 2

Membrane Structure Function

Answer 2

Makes the membrane selectively perimeable
-Lets through small molecules and water
- Keeps out big molecules and charged molecules

Question 3

Concentration Gradient

Answer 3

• When the number of solute molecules on one side of a membrane is different than the other side
• Solute molecules move down until equilibrium

Question 4

Transport

Answer 4

• Moves in and out of the cell depending on the molecule and other factors

Question 5

Passive Transport

Answer 5

When movement of molecules is driven by concentration gradient
- Two types: diffusion and osmosis

Question 6

Diffusion

Answer 6

• Movement of molecules from an area of higher concentration to an area of lower concentration

Question 7

Osmosis

Answer 7

• Water can diffuse from an area of high to low
• Free water = not associated with a solute molecule

Question 8

Hypertonic

Question 9

Isotonic

Question 10

Hypotonic

Question 11

Facilitated Diffusion

Answer 11

• Type of passive transport
• Integral protein provides channel

Question 12

Active Transport

Answer 12

• Cell uses ATP energy to move ions or molecules against the concentration gradient
• Transport protein changes shape

Question 13

Exocytosis

Answer 13

• Export larger things out of the cell
• Membrane of a vesicle merges w/ the plasma membrane

Question 14

Endocytosis

3 Types

Answer 14

• Cell takes in larger molecules

Question 15

Pinocytosis

endocytosis

Answer 15

Cell membrane takes in smaller particles

Question 16

Phagocytosis

endocytosis

Answer 16

Cell engulfs larger particles by reaching out

Question 17

Receptor Mediated Endocytosis

(Selective)

Answer 17

Receptor protein will only bind w/ specific target… causing the vesicle to form