Science F3 Chapter 2

Which of the following is the adaptation of alveolus?

• small surface area

• thick alveolus wall

• moist alveolus wall

• small quantitiies of blood capillaries

Bell jar represent ___ while ballooon represent the _____

(a)  

during exhalation, the

• size of lungs remain unchange

• volume of lungs increase

• the lungs decrease in size

• ribs cage move upwards

Which of the following is correct

• nostril--> bronchus --> bronchiole--> trachea --> alveolus

• nostril --> trachea --> bronchus --> bronchiole --> alveolus

• nostril --> trachea --> bronchiole --> bronchus --> alveolus

• nostril --> trachea --> bronchus --> aleolus --> bronchiole

what is colour of oxygenated blood

• bright red

• dark red

• pink

• purple

The pigment involve in transporting oxygen is

• oxyhaemoglobin

• oxyhaemophilia

• hemophilia

• haemoglobin

the red arrow represent

During inhalation,

• the size of lungs decrease

• the rib cage move upwards and outwards

• the diaphragm relax

• the external intercostal muscle relax

Name the gaseous exchange process that occur

(a)  

The alveolus is made of single layer of cell only so that diffusion of gas can occur (a)