Functions of the Respiratory System

• What is the process of bringing air into the lungs called?

  Inspiration
• What is the process of expelling air from the lungs called?

  Expiration
• Where does gas exchange occur in the respiratory system?

  In the alveoli
• How does CO2 content in blood affect body pH?

  It alters the pH of body fluids
• How does respiratory rate influence CO2 levels in the body?

  Higher rates increase CO2 levels, affecting pH
• What generates sound in the respiratory system?

  Air passing through vocal folds
• What two variations of sound are produced by the vocal folds?

  Pitch and amplitude
• What is the sense of smell called?

  Olfaction
• How does the olfactory nerve contribute to the sense of smell?

  It detects fragrance and relays messages to the brain
• Where do chemical receptors for smell detect fragrance?

  In the nasal cavity
• What is the relationship between the respiratory system and body pH regulation?

  CO2 levels influence pH through respiratory rate