Level 1 Questions Cell Membrane & Transport

Front 1

The model that describes the cell membrane

Back 1

fluid mosaic model

Front 2

The components of the cell membrane

Back 2

phospholipids, carbohydrates, proteins, cholesterol

Front 3

The most predominant part of the cell membrane

Back 3

phospholipids

Front 4

carbohydrate attached to a protein

Back 4

glycoprotein

Front 5

carbohydrate attached to a lipid

Back 5

glycolipid

Front 6

function of cholesterol in the cell membrane

Back 6

provide stability and fluidity to the membrane

Front 7

the number of layers of phospholipids in the cell membrane

Back 7

2

Front 8

function of proteins in the cell membrane

Back 8

signalling, cell recognition, transport, enzymatic

Front 9

function of carbohydrates in the cell membrane

Back 9

cell recognition

Front 10

The 3 types of transport across the cell membrane

Back 10

1) diffusion 2) transport by carriers 3) endo/exo-cytosis

Front 11

The 2 types of diffusion

Back 11

1) simple diffusion 2) osmosis

Front 12

What particles move by simple diffusion across a cell membrane?

Back 12

small, non-polar molecules such as gases

Front 13

What particles move by osmosis across a cell membrane?

Back 13

water

Front 14

What is needed in order to allow diffusion to occur?

Back 14

A concentration gradient (difference in concentration of a particle between 2 sides)

Front 15

What are factors that affect diffusion rate?

Back 15

1) particle size 2) temperature 3) concentration difference between sides

Front 16

Define tonicity

Back 16

The amount of solute in a solution

Front 17

Hypertonic

Back 17

A lot of solute in solution

Front 18

Hypotonic

Back 18

A little amount of solute in solution

Front 19

Isotonic

Back 19

The same amount of [solute] when comparing 2 solutions.

Front 20

Which way will water osmose when comparing 2 solutions (hyper and hypo- tonic)?

Back 20

water will move from hypotonic solutions to hypertonic solutions

Front 21

Osmotic pressure

Back 21

The pressure created by the movement of water from one area to another

Front 22

What are the two types of transport by carriers?

Back 22

1) facilitated transport 2) active transport

Front 23

Facilitated transport

Back 23

The movement of particles that are too large or polar across the cell membrane, down their concentration gradient with the aid of a protein channel.

Front 24

Active transport

Back 24

The movement of particles (small, large, polar & nonpolar) against their concentration gradient with the aid of a protein channel/pump AND ATP

Front 25

2 types of Endocytosis

Back 25

1) pinocytosis 2) phagocytosis

Front 26

Endocytosis

Back 26

The movement of large particles or a bulk of small particles INTO the cell; requires energy

Front 27

Pinocytosis

Back 27

Cell drinking; movement of large amounts of little things into the cell at once

Front 28

Phagocytosis

Back 28

Cell eating; movement of large molecules into the cell

Front 29

Exocytosis

Back 29

The movement of large molecules or large amounts of small molecules OUT of the cell at once; requires energy

Front 30

Solution is made up of

Back 30

solute (like salt) + solvent (like water)