The Cell - Movement Across Cell Membrane

Front 1

1. The fatty acid chains of a phospholipids are non polar/polar

Back 1

Non polar

Front 2

2. The cell membrane is formed from two/three rows of phospholipids

Back 2

Two

Front 3

3. Water comprises approximately 40/60% of adult body weight

Back 3

60%

Front 4

4. There is more fluid in the intracellular/extracellular compartment

Back 4

Intracellular

Front 5

5. Potassium is in higher concentration in the Intracellular/extracellular fluid

Back 5

Intracellular

Front 6

6. Integral/peripheral proteins act as channels to allow substances to enter and exit the cell

Back 6

Integral

Front 7

7. Glycoproteins contain proteins and fats joined together
True or False

Back 7

False

Front 8

8. The electrical charge of a solute does not affect its ability to cross the cell membrane
True or False

Back 8

False

Front 9

9. In most cases, substances move up/down their gradient until equilibrium is reached

Back 9

Down the gradient

Front 10

10. Active/Passive transport does not require the degradation of ATP

Back 10

Passive

Front 11

11. Simple/Facilitated diffusion requires a transporting protein in the cell membrane

Back 11

Facilitated

Front 12

12. Osmosis is characterised by movement of the solvent/solute

Back 12

Solvent

Front 13

13. Filtration is the result of a concentration/pressure gradient

Back 13

Pressure

Front 14

14. Primary active transport allows Potassium/Sodium to exit the cell

Back 14

Sodium

Front 15

15. Antiporters/Symporters move substances in opposite directions

Back 15

Antiporters

Front 16

16. Which of the following does not allow substances to enter the cell – a) Phagocytosis
b) receptor mediated endocytosis
c) Exocytosis
d) Pinocytosis

Back 16

Phagocytosis

Front 17

Diffusion is the movement of solutes and osmosis involves the movement of Solvents.
True or False

Back 17

True

Front 18

Osmosis happens in the body as the solutes are unable to cross a membrane without a faciliatating molecule. How does the solvent get around .

Back 18

Solvent moves instead

Front 19

Primary active transport allows Phosphate (from ATP & ADP) alter the transport channel and allow molecules to move where?

Back 19

In and out of cells

Front 20

Secondary active transport also uses energy which it obtains from ?

Back 20

Sodium and hydrogen ion concentration.

Front 21

On which side of the cell can you find water?

Back 21

On both sides of a cell - inside and outside

Front 22

What are the two layers of Phospholipds referred to as?

Back 22

Phospholipid bi-layer

Front 23

The phosphate end of a fatty acid chain is Hydrophylic or Hydrophobic?

Back 23

Hydrophylic

Front 24

Is water usually referred to as a solute or a solvent?

Back 24

Solvent

Front 25

Where is intracellular fluid found?

Back 25

Inside the cell

Front 26

Where in the body can you find extracellular fluid?

Back 26

Intercellular (between the cells) - 30%
Intravascular - (plasma in blood vessels) - 7%
Other fluids:- 2-3%
Cerebrospinal fluid
Fluid of the eye
Body secretions - mucous/digestive juices
Excretions - Urine, faeces, perspiration

Front 27

In the extracellular area - which substances are found in high amounts?

Back 27

Sodium and Chloride

Front 28

In the intracellular area - whcih substances are found in high amounts?

Back 28

Potassium
Phosphates
Proteins

Front 29

What substances are found in moderate amounts in/out of the cells?

Back 29

Extracellular - Bicarbonate & Proteins
Intracellular - Magnesium, Bicarbonate & Sulphates

Front 30

The proteins that pass through the cell membrane are known as?

Back 30

Integral proteins

Front 31

Proteins that are only found on one side of the membrane are known as?

Back 31

Peripheral proteins

Front 32

A glycolipid is a combination of what and which forms the head portion?

Back 32

A carbohydrate and a lipid.
Carbohydrate forms the head portion

Front 33

A glycoprotein is a combination of what?

Back 33

A carbohydrate and a protein

Front 34

What is the role of selective permeability?

Back 34

To allow certain substances to pass through the membrane

Front 35

What are the factors that affect permeability of the cell membrane?

Back 35

Solubility of the substance
Size of the molecule
Electrical charge of the molecule
Presence of channels

Front 36

How is a concentration gradient created?

Back 36

By differing no.s of molecules on either side of the membrane

Front 37

Which direction do molecules go in a cocentration gradient?

Back 37

Down the gradient

Front 38

What is a pressure gradient?

Back 38

Created by differing pressures on either side of a membrane

Front 39

What is moved across the membrane to create equilibrium in a pressure gradient?

Back 39

Solvents and some of their solutes move until equilbrium is reached