respiratory system

What happens to the diaphragm during exhalation?

• It contracts and flattens

• It relaxes and moves upward

• It remains unchanged

• It vibrates

Pressure increases, volume decreases and air moves out.

• inhalation
• exhalation
• nasal cavity
• pharynx

During breathing process, _______________ carried into the lungs, at the same time ________________ carried out of the lungs.

• oxygen, carbon dioxide

• carbon dioxide, oxygen

• my mom's fragrant, water vapour

• nitrogen, oxygen

What muscles are used in breathing in and breathing out?

• diaphragm and intercostals
• diaphragm and lungs
• lungs and ribs
• lungs and diaphragm

When the diaphragm contracts...

• the volume of the thoracic cavity increases and the pressure decreases, causing air to rush into the lungs.
• the volume of the thoracic cavity decreases and the pressure increases causing air to rush out of the lungs. 

It is a tiny air sacs and looks like grape

• blood capillary

• lung

• alveoli

• bronchus

Nostril - trachea - X - bronchioles - alveolus.

So X is,

• lung

• blood capillary

• bronchus

• Larynx

Which of the following is not a function of the respiratory system?

• Ventilation

• Speech production

• Leukocyte production

• Gas exchange

Which lung contains two lobes?

• Right lung

• Left lung

• Neither answers are correct

• Both answers are correct

What is the function of cilia?

• to move microbes, mucus and debris upwards

• to warm and moisten the air

• to trap dust and irritating particles

• to create the sneezing reflex