Cell Membrane

Question 1

Cell membrane construction (4 things)

Answer 1

Phospholipid bilayer

Hydrophilic phosphate head

Hydrophobic fatty acid tail

Proteins, Carbohydrates (glycoproteins/glycolipids), Cholesterol

Question 2

Extracellular fluid

Answer 2

Fluid outside the cell

Question 3

Cell membrane (3 must knows)

Answer 3

Selectively permeable

Separates intracellular/extracellular environments of the cell

Controls what enters and exits the cell

Question 4

Transport/Channel protein

Answer 4

Channels/transports molecules across the membrane through passive transport (facilitated diffusion) according to the concentration gradient

Question 5

Cholesterol

Answer 5

Structural stability + Regulation

Question 6

Carbohydrate (glycoprotein/glycolipid)

Answer 6

Recognition and adhesion between cells

Question 7

Passive transport

Answer 7

Movement of molecules across the cell membrane with no use of energy

Question 8

Types of passive transport (3 things)

Answer 8

Simple diffusion

Facilitated diffusion

Osmosis

Question 9

Diffusion

Answer 9

Movement of molecules from a high to low concentration

Question 10

Facilitated diffusion

Answer 10

Movement of molecules from a high to low concentration with the assistance of transport proteins

Question 11

Osmosis

Answer 11

Movement of water through a semi-permeable (selectively permeable) membrane from hypotonic to hypertonic

Question 12

Active transport

Answer 12

Movement of molecules from low to high concentrations with the aid of energy

Question 13

Types of active transport (3 things)

Answer 13

Endocytosis

Exocytosis

Carrier Proteins

Question 14

Endocytosis

Answer 14

Movement of molecules into the cell through enclosing the particle

Phagocytosis = cell eating

Pinocytosis = cell drinking

Question 15

Exocytosis

Answer 15

Movement of molecules out of the cell

Question 16

Carrier protein

Answer 16

Channels/transports molecules across the membrane through active transport (ATP) against the concentration gradient