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WorksheetsCH9.2-1 Respiration CYU
Total questions: 19
Worksheet time: 14mins
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
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
Which of the following describes active expiration?
Only diaphragm relaxes
Passive process
Occurs during exercise or asthma with forced air out
Involves relaxation of intercostals
What triggers a cough?
Irritation of phrenic nerves
Low oxygen levels
Dust in the lower respiratory tract
Stimulation of yawning centers
What causes a sneeze?
High blood pressure
Stimulation of nerves in nasal passages
Vocal cord contraction
Diaphragm relaxation
What is a hiccup caused by?
Bronchial irritation
Sudden contraction of heart muscles
Irritation of phrenic nerves causing diaphragm spasm
Blockage of nasal cavity
Why do we yawn?
To remove CO₂
To help sleep
To increase oxygen in the lungs
To reduce pressure in the sinuses
According to Boyle’s Law, as the (a) of a gas increases, the (b) decreases.
During inhalation, lung volume (a) , causing intrapulmonary pressure to (b) , allowing air to enter the lungs.
Exhalation occurs when the lungs (a) , which causes the pressure inside the lungs to (b) , forcing air out.
Boyle’s Law helps explain that gas moves from areas of (a) pressure to areas of (b) pressure.
