Functions Related to Gas Exchange and Respiratory System

Which part of the respiratory system is responsible for dividing air into each lung?

• Trachea

• Primary bronchi

• Secondary bronchi

• Bronchiole

What are the air sacs in bronchioles called?

• Alveoli

• Capillaries

• Bronchi

• Veins

What role do the intercostal muscles play in breathing?

• They protect the lungs

• They assist in the movement of the ribs during breathing

• They filter air entering the lungs

• They produce sound

Which structure separates the chest cavity from the abdominal cavity?

• Ribs

• Diaphragm

• Trachea

• Lungs

What happens to the diaphragm during expiration?

• It contracts

• It relaxes

• It expands

• It stays the same

What is the effect of diaphragm relaxation on lung pressure?

• Increases lung pressure

• Decreases lung pressure

• No change in lung pressure

• Increases lung temperature

Which condition is characterized by increased breathing and lower CO₂ concentration?

• Hypoventilation

• Hyperventilation

• Asthma

• Sleep apnea

What is the primary gas involved in regulating breathing?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

Which of the following is a result of low blood oxygen?

• Decreased breathing rate

• Increased breathing rate

• No change in breathing rate

• Stabilized breathing rate

What is hypoxia?

• A condition with excess oxygen in the body

• A disease with a lack of oxygen in the body's tissues

• A type of bacterial infection

• A condition caused by high blood sugar