Study Guide Group 4

Question 1

Osmosis is

Answer 1

The diffusion of water across a semipermeable membrane

Question 2

Hypotonic

Answer 2

Solution with a lower concentration
Water molecules tend to diffuse out
Cell with Swell

Question 3

Hypertonic

Answer 3

Solution with a higher concentration
Water Molecules diffuse in
Cell Shrinks

Question 4

Isotonic

Answer 4

Solutes are about the same

No net movement of water

Question 5

Passive Membrane Transport

Answer 5

The movement of substances across the membrane without the expenditure of energy
Uses Kinetic Energy

Question 6

Active Membrane Transport

Answer 6

The movement of substances across a membrane withing energy from ATP
*Usually with the help of proteins and against concentration gradient

Question 7

Substances that require Carrier Proteins

Answer 7

Glucose….Glucose transporter
Some Ions……Channel proteins
Molecules…….Transport proteins

Question 8

Ion Pump

Answer 8

Transmembrane protein that moves ions across a plasma membrane against their concentration gradient

Question 9

Sodium Potassium pump

Answer 9

3 sodium ions are pumped out of the cell

2 Potassium ions are pumped into the cell

Question 10

Exocytosis

Answer 10

The process of a cell exporting material using vesicular transport

Question 11

Endocytosis

Answer 11

The process of a cell ingesting material by enveloping it in a portion of its cell membrane

Question 12

Phospholipids relationship to water

Answer 12

Hydophilic Head
Hydrophobic Tails
Head Face out, Tails face in