Surface Area And Transport Mechanisms

Question 1

Diffusion

Answer 1

It is the net movement of molecules from an area of high concentration to an area of low concentration

Question 2

Importance of diffusion in the body

Answer 2

Getting oxygen into the body from the alveoli and removing carbon dioxide
Absorbed nutrients in the intestines

Question 3

Osmosis

Answer 3

It is the movement of water molecules across a semi permeable molecules from a region of high concentration to a region of low concentration until equilibrium is achieved

Question 4

Fick’s law

Answer 4

It states that the rate of diffusion is directly proportional to the surface area and difference in the concentration and it is inversely proportional to the thickness of the membrane

Question 5

Formula in diffusion

Answer 5

Volume : L*B H
Surface area of a cube: LB * number of sides
SA:V

Question 6

Factors that affect diffusion

Answer 6

Temperature
Metabolic rate
Surface area
Concentration
Thickness of the membrane

Question 7

Types of transport mechanisms

Answer 7

Passive transport
Active transport
Co-transport

Question 8

Passive transport

Answer 8

It is a type of membrane transport that does not require energy to move substances across a cell membrane

Question 9

Types of passive transport

Answer 9

Simple diffusion: allows small non polar molecules like oxygen and carbon dioxide to simply diffuse through the cell membrane

Facilitated diffusion: allows pollar molecules such as glucose or water to diffuse in the cell membrane with the help of proteins

Question 10

Osmosis is facilitated by a channel protein called

Answer 10

Aquaporin

Question 11

Active transport

Answer 11

It is the movement of molecules across a cell membrane from low to high concentration involving energy in form of ATP

Question 12

Properties pf active transport

Answer 12

It uses transport proteins
It’s proteins are often called pumps

Question 13

Co- transport

Answer 13

a type of cell membrane transport where the movement of one molecule across the membrane is coupled with the movement of another

Question 14

Properties of co transport

Answer 14

It involves transport proteins

Question 16

Properties of active transport

Answer 16

It uses transport proteins
It’s proteins are often called pumps

Question 17

Co-transport

Answer 17

a type of cell membrane transport where the movement of one molecule across the membrane is coupled with the movement of another

Question 18

Properties of co-transport

Answer 18

It involves transport proteins
It includes symport: molecules moving in the same direction
Antiport: the cells needs to swap one molecule for another