Gas exchange

Gas exchange in humans

Multiple Choice

Given the following structures:
1. alveoli
2. bronchi
3. bronchioles
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

Multiple Choice

Number 11 is pointing to which organ of the Respiratory System?

• Alveoli

• Lungs

• Bronchi Tubes

• Bronchioles

Multiple Choice

The division of the trachea forms

• main bronchi

• alveoli

• lungs

• nose

Multiple Choice

What is the site of gas exchange?

• alveoli

• bronchus

• nose

• trachea

Multiple Choice

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

• bronchi

• lungs

• oxygen

• alveoli

Open Ended

What is the role of cilia and mucus in protecting us from diseases?

Fill in the Blank

surfce so gas do not have to diffuse very far

Fill in the Blank

remove oxygen is quickly so that diffusion can continue

Fill in the Blank

increase number of molecules that can diffuse at the same time

Fill in the Blank

prevents cells from drying out

Fill in the Blank

supply of fresh air keeps up the concentration gradient of oxygen and carbon dioxide

Multiple Select

Events occur during inhalation

• Diaphragm relax

• internal intercostal muscle contract

• Ribs move up and outwards

• lung pressure increase

• Volume increase

Poll

percentage of oxygen in exhaled air

• 21

• 16