Chapter 5 Transports of Solutes and Water

Question 1

How do cells communicate?

Answer 1

through chemical regulators

Question 2

The plasma membrane is _______ permeable.

Answer 2

selectively

Question 3

What is the plasma membrane not permeable to?

Answer 3

large molecules (e.g. proteins)

Question 4

What is the plasma membrane permeable to?

Answer 4

ions, nutrients, and wastes

Question 5

How much water is outside of a cell?

Answer 5

33%

Question 6

Where is most of the water when outside of cells?

Answer 6

80% in interstitial fluid, 20% in blood

Question 7

What is carrier-mediated membrane transport?

Answer 7

facilitated diffusion, active transport

Question 8

What is noncarrier-mediated membrane transport?

Answer 8

simple diffusion of lipid-soluble molecules, simple diffusion of water, simple diffusion of ions through nonspecific channels

Question 9

What does carrier-mediated transport mean?

Answer 9

has something that the cell put in its membrane for that purpose (protein, for example)

Question 10

What does noncarrier-mediated transport mean?

Answer 10

diffusion of stuff across a membrane

Question 11

What directions does diffusion move in?

Answer 11

ALWAYS high to low concentration!

Question 12

What are solutes?

Answer 12

the dissolved materials

Question 13

What are isolated systems?

Answer 13

have no inputs or outputs of energy or matter, often called “equilibriuim”