Ventilation → diffusion → transport → regulation
1. What is the primary purpose of respiration in the body?
2. Which sequence best represents the major processes included in respiration?
3. A process moves air between the atmosphere and the alveoli without describing gas exchange across the alveolar wall; what is this process called?
What is the main purpose of respiration?
To supply tissues with O2 and remove CO2 from the organism.
What are the four components of respiration?
Pulmonary ventilation, diffusion between alveoli and blood, transport in blood and fluids, and regulation of ventilation.
What is pulmonary ventilation?
The movement of air into and out of the lungs between atmosphere and alveoli.
What happens to the ribs during inspiration?
Inspiratory muscles elevate the ribs.
How does the diaphragm move during inspiration?
The diaphragm lowers during inspiration.
What effect does inspiration have on thoracic volume?
Thoracic volume increases during inspiration.
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