HBS Unit 4 Concept 3 - Respiratory System

What is the major function of the respiratory system?

• Supply the body with H2

• Supply the body with O2

• Supply the body with CO2

• Supply the body with N2

Which structure warms, humidifies, and filters air as it travels to the respiratory zone?

• Lungs

• Nasal cavity

• Trachea

• Pharynx

What is the piece of cartilage that blocks the larynx when we swallow food?

• Alveoli

• Bronchioles

• Trachea

• Epiglottis

How many lobes does the right lung have?

• 3

• 1

• 4

• 2

What are the serous membranes that line the thoracic wall and diaphragm called?

• Mesentery

• Peritoneum

• Pericardium

• Pleurae

Where does gas exchange occur in the respiratory zone?

• Bronchioles

• Alveolar ducts

• Pharynx

• Larynx

What is the process of diffusion of O2 and CO2 between the alveoli and blood in the lungs called?

• Bulk flow

• Filtration

• Osmosis

• Gas exchange

When we inhale, what happens to the diaphragm?

• It relaxes

• It contracts

• It expands

• It shrinks

What is the muscle that moves the lungs and separates the thoracic cavity from the abdominal cavity?

• Diaphragm

• Intercostal muscles

• Abdominal muscles

• Pectoral muscles

What happens during expiration?

• Inspiratory muscles contract

• Diaphragm lowers

• Lungs expand

• Air flow out