What is the main function of the respiratory system?

• To digest food

• To circulate blood

• To exchange gases

• To produce energy

What is pulmonary ventilation?

• Movement of air into blood

• Gas exchange in tissues

• Air moving in and out of the lungs continuously

• Oxygen binding to hemoglobin

Where does external respiration occur?

• Between alveoli and pulmonary blood capillaries

• Between tissues and capillaries

• In the heart

• In muscle fibers

Tags

NGSS.HS-LS2-5

Which process involves gas exchange inside body tissues?

• External respiration

• Internal respiration

• Ventilation

• Pulmonary diffusion

What does Boyle’s Law state?

• Pressure and volume are equal

• Pressure and volume are directly related

• Volume increases as pressure increases

• Pressure and volume are inversely related

What is atmospheric pressure at rest?

• 700 mmHg

• 800 mmHg

• 760 mmHg

• 763 mmHg

What happens when intrapulmonary pressure is equal to atmospheric pressure?

• Inhalation occurs

• Exhalation occurs

• There is no airflow

• Oxygen is released

What must occur for inhalation to happen?

• Intrapulmonary pressure must exceed atmospheric pressure

• Lungs must contract

• Intrapulmonary pressure must be lower than atmospheric pressure

• The diaphragm must relax

What muscle action assists with inspiration?

• Diaphragm relaxes

• Internal intercostals contract

• External intercostals contract and diaphragm flattens

• Abdominal muscles contract

What is the intrapulmonary pressure approximately during passive expiration?

• 760 mmHg

• 763 mmHg

• 700 mmHg

• 780 mmHg