Ch 5 Membranes

Question 0

4 components of cellular membranes

Answer 0

Phospholipid bilayer
Transmembrane proteins
Interior protein network (peripheral or intercellular)
Cell surface markers- cells can recognize each other

Question 1

Fluid mosaic model

Answer 1

Mosaic of proteins floats in or on the fluid lipid bilayer like boats on a pond

Question 2

Membrane proteins various functions

Answer 2

Transporters
Enzymes- breaks things down
Cell surface receptors
Cell surface identity markets
Cell to cell adhesion proteins
Attachments to cytoskeleton

Question 3

Peripheral proteins

Answer 3

Anchoring molecules attach membrane protein to surface

–Non polar regions that insert the internal portion of the lipid bilayer

–chemical bonding domains that link directly to proteins

Question 4

Intergral membrane protein

Answer 4

Goes through the entire lipid bilayer

Question 5

Passive transport

Answer 5

A movement of molecules through a membrane that require no energy

Question 6

Diffusion

Answer 6

Movement of molecules from high concentration to low concentration

Question 7

Carrier proteins

Answer 7

Help transport both ions and other solutes like sugars and amino acids

Question 8

Osmosis

Answer 8

Diffusion of water across a membrane towards a higher solute conentration

Question 9

Hypotonic

Answer 9

Solution has a lower solute concentration

Question 10

Hypertonic

Answer 10

Solution has a higher solute concentration

Question 11

Active transport

Answer 11

Requires atp. Moves substances from low to high concentration

Question 12

Endocytosis

Answer 12

Movement of substances into the cell

Question 13

Phagocytosis

Answer 13

Cell takes in particular matter

Question 14

Pinocytosis

Answer 14

Cell takes in only fluid

Question 15

Exocytosis

Answer 15

Movement of substances out of cell. Requires energy