Syructure And Function Of The Airways

Question 1

Define breathing

Answer 1

The act of breathing air in and out

Question 2

Process of supplying oxygen to cells;

Answer 2

The chemical and physical process in which oxygen is delivered to tissues or cells in an organism and carbon dioxide and water are given off external respiration

Question 3

Energy-producing process in cells:

Answer 3

A metabolic process in cells leading to the production of energy by the breakdown of organic substances internal respiration

Question 4

Why are nasal hairs important ?

Answer 4

Act as a filter to keep the dust and dirt out

Help maintain humidity

Question 5

Summarise the role of the turbinates in the nose;

Answer 5

Air conditioning - temp and humidity

Filtration - mucus and cilia covered large surface area

Support of the olfactory system

Question 6

Outline the role of surfactant ;

Answer 6

• air-water interface has high surface tension
• surface tension- strong force trying to minimise surface area
• can cause alveolar sacs to collapse
• infantile respiratory distress syndrome

Question 7

Describe the pulmonary surfactant:

Answer 7

• secreted by bronchialar clara cells and aveolar type II cells

-99% phospholipid 1%protein

• thin layer on alveolar surface