Gas Exchange

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi

• lungs

• oxygen

• alveoli

Which of the following are features of the alveoli that adapt them to gas exchange?

I. High surface area

II. Thin walls

III. Dry surfaces

• I and II only

• I only

• II and III

• I, II, and III

Alveoli can expand because they are coated with...

• mucus

• surfactant

• water

• cartilage

Tags

NGSS.MS-LS1-2

When you breathe, your lungs take in ___ and remove ___.

• air/oxygen

• oxygen/carbon dioxide

• carbon dioxide/waste

• waste/air

What is the name of two main branches from the trachea (one to each lung)?

• bronchi

• alveoli

• capillaries

• bronchioles

Given the following structures:

Which of the following is the correct order in which air would flow after inhalation?

• 1,2,3

• 2,1,3

• 2,3,1

• 3,2,1

Diaphragm is

• part of lungs

• muscle that helps in breathing

• throat muscle

• structure in bones

Which of the following is/are true of the lung disease emphysema?

• It is caused by bacteria

• It is non-life threatening

• Elastic fibres in alveoli membranes are digested

• It is when the alveoli walls break down

Which of the following is true of Type 1 pneumocytes?

• They are thin, single layer of permeable cells in the alveoli walls

• They secrete a chemical called surfactant

• They cover about 5% of the alveoli surface

• They are not directly involved with gas exchange

Tags

NGSS.MS-LS1-3

What can cause change in pressure when we breathe?

• Carbon dioxide levels

• Oxygen levels

• Diaphragm movement

• lung movement