Respiratory System

Question 1

Define: Pulmonary Ventilation

Answer 1

Mechanical inhalation and exhalation of air.

Question 2

Define: External respiration

Answer 2

Exchange of air: CO2 (outflow) and O2 (inflow).

Question 3

Define: Internal respiration

Answer 3

Pulmonary capillary blood gains O2 and loses CO2.
Exchange of gasses between alveoli and blood capillaries in the lungs.

Question 4

6

What are the components of the respiratory system? (txtbk)

Answer 4

• Nose
• Pharynx (throat)
• Larynx (voice box)
• Trachea (windpipe)
• Bronchi
• Lungs

Question 5

3

What are the 3 basic steps of respiration? (txtbk)

Answer 5

. Pulmonary ventilation
- inhalation of air

. External respiration
- blood gains O2, loses CO2

. Internal respiration
- blood loses O2, gains CO2

Question 6

3

Functions of the respiratory system (txtbk)

Answer 6

• Intake of O2 for delivery to cells and removal of CO2 produced by cells
• Helps regulate blood pH
• Contains receptors for smell, filters air, and excretes small amounts of water and heat

Question 7

Pulmonary ventilation____when blood pCO2 increases.

Answer 7

Increases

Question 8

Hypercapnia is which of the following:
a) decreased arterial oxygen partial pressure
b) increased arterial carbon dioxide partial pressure
c) increased arterial oxygen partial pressure

Answer 8

b

Question 9

A decrease in blood pO2 causes pulmonary ventilation to______

Answer 9

Increase

Question 10

When blood pCO2 increases, the pH of blood

Answer 10

decreases