Which of the following shows what happens to the chest cavity when air rushes into the lungs?

• decrease in volume

• deflates

• expands

• relaxes

How do you describe the condition of the diaphragm as one exhales?

• the diaphragm contracts

• the diaphragm relaxes

• the diaphragm goes down

• both a and c

Which two muscles are responsible for BREATHING?

• The Diaphragm

• The Lungs

• The Heart

• The Intercostal Muscles

Suggest two functions of the Intercostal muscles during breathing.

• contract to expand the chest cavity by moving the ribs up and out during inspiration.

• relax to reduce the chest cavity by allowing the ribs to move downwards and inwards during expiration.

• Increases pressure of the lungs

• Decreases pressure in the lungs

Answer explanation

contract to expand the chest cavity / move the ribs up and out during inspiration;

relax to reduce the chest cavity / allow the ribs to move downwards and inwards during expiration;

During Breathing we get Oxygen in the body and get rid of which other gas?

• Carbon Dioxide

• Hydrogen

• Monoxide

What primary gas product is removed from your system during Exhalation?

• Air

• Oxygen

• Carbon Dioxide

• Carbon Monoxide

Where the exchange of gases actually occur?

• Bronchi

• Trachea

• Oxygen

• Alveoli

The diagram below show the relative positions of the human respiratory system and its associated structures in two different breathing stages:

which of the following statements correctly describes the change that takes place form stage P to stage Q?

• Pressure inside the lungs is increasing.

• Diaphragm muscle is contracting.

• Volume of the lungs is increasing.

• Rib cage is moving upward.

Tags

NGSS.MS-PS3-5

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:

• Inspiratory Reserve Volume

• Tidal Volume

• Expiratory Reserve Volume

• Residual Volume

A person suffer’s punctures in his chest cavity in an accident, without any damage to the lungs. its effect could be

• Reduced breathing rate

• Rapid increase in breathing rate

• No change in respiration

• Cessation of breathing