Respiratory Physiology

Question 1

External Respiration is

Answer 1

Exchange of gases between blood and lungs

Question 2

Internal Respiration is

Answer 2

Exchange of gases between blood and cells

Question 3

organs of the respiratory system

Answer 3

nose, pharynx, larynx, trachea, two bronchi, bronchioles, lungs and their covering (pleura)

Question 4

3 stages of respiration

Answer 4

Ventilation
External respiration
Internal respiration

Question 5

What is Aerobic Respiration?

Answer 5

Involves catabolism of nutrients resulting in the formation of co2, h2o and energy
o2 is required for cell activity
active transport process is utilised through the movement of electrolytes across cell membranes i.e. sodium potassium pump or facilitated diffusion

Question 6

What is anaerobic respiration

Answer 6

Used in the absence of no/limited o2, to initiate glycolysis when ATP is required
less efficient than aerobic respiration
results in the formation of lactate which is toxic and will then need to be detoxified

Question 7

The first stage of glucose catabolism is what

Answer 7

glycolysis

Question 8

Glycolysis is an anaerobic/aerobic process

Answer 8

Anaerobic

Question 9

Where does glycolysis take place within the cell

Answer 9

Cytoplasm

Question 10

One glucose molecule is converted into what

Answer 10

two molecules of pyruvic acid, two molecules of ATP

Question 11

If there is sufficient oxygen what happens to the pyruvic acid

Answer 11

it enters krebs cycle

Question 12

where does krebs cycle take place

Answer 12

mitochondria of the cell

Question 13

What happens when oxygen is low?

Answer 13

Pyruvic acid does not enter krebs cycle and therefore it is converted anaerobically to lactic acid