PRELIM 02 - Membrane Transport

Question 1

Is the outermost component of a cell and forms the boundary

Answer 1

Cell membrane

Question 2

Some materials can pass through, while others are excluded

Answer 2

Selectively permeable barrier

Question 3

The difference in the concentration of a solute in a solvent between two points divided by the distance between the two points

Answer 3

Concentration gradient

Question 4

2 types of cell membrane channels

Answer 4

Leak channels, Gated channels

Question 5

Constantly allow ions to pass through

Answer 5

Leak channels

Question 6

Limit the movement of ions across the membrane by opening and closing

Answer 6

Gated channels

Question 7

The pressure created by water moving across a membrane due to osmosis

Answer 7

Osmotic pressure

Question 8

Are proteins within the cell membrane that are involved in carrier-mediated transport mechanisms

Answer 8

Carrier molecules

Question 9

Move large, water-soluble molecules or electrically charged ions across the cell membrane

Answer 9

Carrier-mediated transport mechanisms

Question 10

2 types of carrier-mediated transport mechanisms

Answer 10

Facilitated diffusion, Active transport

Question 11

Means that only specific molecules are transported by the carriers

Answer 11

Specificity

Question 12

Moves Na+ out of cells and K+ into cells

Answer 12

Sodium-potassium pump

Question 13

2 types of secondary active transport

Answer 13

Cotransport, Countertransport

Question 14

The diffusing substance moves in the same direction as the transported substance

Answer 14

Cotransport

Question 15

The diffusing substance moves in a direction opposite to that of the transported substance

Answer 15

Countertransport

Question 16

Membrane-bound sacs

Answer 16

Vesicles

Question 17

Occurs when a specific substance binds to the receptor molecule and is transported into the cell

Answer 17

Receptor-mediated endocytosis