Lecture 3

Question 1

Micelle

Answer 1

Cell formed by single tailed phospholipids

Question 2

Amphipathic

Answer 2

Possesses both hydrophobic and hydrophilic domains

Question 3

Integral Membrane Protein

Answer 3

Protein embedded into the plasma membrane

Question 4

Permeable

Answer 4

A substance can freely diffuse across the bilayer

Question 5

Impermeable

Answer 5

A substance unable to cross the hydrophobic core of the membrane, either due to size or charge

Question 6

Osmosis

Answer 6

Passive diffusion of water

Question 7

Diffusion

Answer 7

Movement of molecules from an area of high concentration to an area of low concentration

Question 8

Hypertonic Environment

Answer 8

Greater solute concentration outside the cell than inside, water rushes out

Question 9

Hypotonic Environment

Answer 9

Greater solute concentration inside the cell than outside, water rushes in

Question 10

Osmotic Lysis

Answer 10

Bursting of cell caused by too much water entering

Question 11

Plasmolysis

Answer 11

Cell membrane detaching from cell wall

Question 12

Aquaporins

Answer 12

Transmembrane channel protein that facilitates osmosis

Question 13

Facilitated Diffusion

Answer 13

Molecules move down their concentration gradient using a channel protein

Question 14

Channel Protein

Answer 14

Integral membrane protein that allows transport of a specific molecule down channel

Question 15

Carrier Protein

Answer 15

Integral membrane protein that allows transport of a specific molecule and changes shape with transport

Question 16

Active Transport

Answer 16

Transport of molecules up the concentration gradient using energy

Question 17

Cotransfer

Answer 17

When two molecules use the same transporter

Question 18

Antiport

Answer 18

Transport protein that transports 2 molecules in opposite directions

Question 19

Electrogenic Pump

Answer 19

Pump powered by the hydrolysis of ATP

Question 20

Electrochemical Gradient

Answer 20

A difference in concentration and charge across a membrane

Question 21

Cotransport

Answer 21

Transport of 2 molecules simultaneously

Question 22

Symport

Answer 22

Transport protein that transports 2 molecules in the same direction

Question 23

Coupled Transport

Answer 23

One gradient is used to power the secondary active transport of another molecule

Question 24

Exocytosis (Secretion)

Answer 24

Bulk transport out of the cell

Question 25

Endocytosis (Phagocytosis)

Answer 25

Bulk transport into the cell

Question 26

Generalized Endocytosis

Answer 26

Non-specific uptake of extra-cellular components

Question 27

Receptor Mediated Endocytosis

Answer 27

Endocytosis of a specific ligand

Question 28

Ligand

Answer 28

Anything that binds a receptor

Question 29

Receptor

Answer 29

Transmembrane protein that recognizes and binds a specific ligand

Question 30

Clathrin

Answer 30

Complex protein that coats vesicles and removes receptor proteins from the vesicle

Question 31

Glycoplipid

Answer 31

A carbohydrate covalently linked to a lipid, used in stabilizing membrane and cell-cell interactions, 1 branch

Question 32

Glycoprotein

Answer 32

A carbohydrate covalently linked to a protein, used in cell-cell recognition and binding other molecules, 2 branches