15 Questions
What is the process called through which atmospheric air is directed through the air passage ways up to the alveoli in the lungs?
Inspiration
What happens to the volume of thorax (chest) during inspiration?
It increases
What is the role of intercostal muscles during expiration?
They relax
What forces the air present in the lungs to move outside through the body during expiration?
Increased pressure on lungs
Which process involves the external air rushing inside from high pressure to low pressure?
Inspiration
Which gas is primarily responsible for the gaseous exchange in alveoli?
Carbon dioxide
What is the composition of oxygen in inspired air as a percentage?
About 21%
What is the purpose of passing exhaled air into lime water as demonstrated in Fig. 1.6?
To demonstrate the release of carbon dioxide during expiration
Why are alveoli and blood capillaries only one cell layered in thickness?
To increase the surface area for gaseous exchange
What is the role of hemoglobin in the gaseous exchange process in alveoli?
To transport oxygen to body tissues
What is the term for the process in which a machine functions like lungs when a patient's natural breathing becomes difficult?
Artificial ventilator
What is the term for the gradual increase in concentration of carbon dioxide in the blood that causes an increase in breathing rate?
Hyperventilation
What is the term for the additional amount of oxygen required after anaerobic respiration, which is obtained through deep breaths?
Oxygen debt
Which part of the brain regulates the involuntary process of breathing?
Medulla oblongata
What causes pain and cramp in normal muscles as a result of anaerobic respiration?
Lactic acid formation
Test your knowledge of the respiratory system and its processes, including inspiration and chest expansion. Learn about the air passage ways, alveoli, intercostals muscles, and diaphragm.
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