gas exchange and transport

Gas exchange is needed to supply _____________ to cells and remove __________________

• carbon dioxide; oxygen

• oxygen; food

• oxygen; carbon dioxide

• carbon dioxide; water

The movement by diffusion of oxygen and carbon dioxide across a membrane

• Ventilation
• Breathing
• Gas exchange
• Respiration

Respiration is the 

• Intake of oxygen and release of carbon dioxide over a membrane
• Release of energy from food inside cells
• Mechanical movement to inhale and exhale air
• Feature that enable an animal to survive in its habitat

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body

• to bring oxygen to the body

• to break down food and absorb nutrients

• to remove oxygen from the body and deliver carbon dioxide

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

The trachea leads to the...

• Bronchioles
• Bronchi
• Esophagus
• Pulmonary Vessel

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

• Bronchi

• Trachea

• Oxygen

• Alveoli

Letter D is pointing to which Respiratory organ?

• Alveoli
• Diaphragm
• Lung
• Bronchi

Name the structure through which gases enter and leave the body of an insect.

• tracheoles

• alveoli

• lungs

• spiracles

Oxygen and carbon dioxide diffuse across the wall of air sac by the process of.......

• active transport

• exocytosis

• osmosis

• diffusion