Chapter 4- Membrane Dynamics

Question 1

Metabolism

Answer 1

sum of all chemical reactions in the body

Question 2

Hydrophilic

Answer 2

water loving, “heads” face internal and external cellular spaces

Question 3

Hydrophobic

Answer 3

water fearing, “tails” lie internal to the plasma membrane

Question 4

Aqueous

Answer 4

containing water, dissolved in water

Question 5

Selectively permeable

Answer 5

the cell membrane has some control over what can cross it

Question 6

Simple diffusion

Answer 6

movement of molecules from high to low without aid or energy expended

Question 7

Passive

Answer 7

no additional energy required; occurs spontaneously (on its own)

Question 8

Facilitated diffusion

Answer 8

movement of molecules from high to low with aid, but no energy expended

Question 9

Active transport

Answer 9

movement of molecules from low to high, requires energy

Question 10

ATP

Answer 10

Adenosine triphosphate, the major unit of cellular energy

Question 11

Osmotic pressure

Answer 11

pressure that must be applied to prevent water movement

Question 12

Isotonic

Answer 12

equal numbers of solutes/water on both sides of the membrane

Question 13

Hypotonic

Answer 13

containing less solutes/more water on a particular side of the membrane

Question 14

Hypertonic

Answer 14

containing more solutes/less water on a particular side of the membrane