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Portage Learning Pathophysiology NURS 231 Unit 5 Exam
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Portage Learning Pathophysiology NURS 231 Unit 5 ExamConducting airways and respiratory tissues
The respiratory system can be divided into what 2 structures?
Trachea, bronchi, bronchioles, alveoli
What are the levels of branching?
Alveoli
Where is the site of gas exchange?
Type 1 and II alveolar cells, macrophages
What cells are in the alveolar epithelium?
Where there is a widening of the chest cavity through the inspiratory muscles during
inspiration, air moves in. On the contrary, expiration is defined as when air moves out of
the lungs, the chest muscles (inspiratory) relax, and the chest cavity diminishes in size.
Explain what occurs during inspiration and expiration:
The diaphragm is considered the major inspiratory muscle. When the diaphragm
contracts, the chest expands during inspiration. During expiration, the volume of the
chest cavity diminishes and its pressure inside increases.
, For questions 3-6 please provide brief answers to the following questions. An example
of how you could format you submission is provided below each question in italics.
What occurs to the diaphragm during inspiration and expiration?
Compliance describes how easily the lungs can be inflated. The major determinants that
will affect lung compliance include: elastin, collagen, elastic recoil, and surface tension.
What is lung compliance? What determines lung compliance?
Ventilation refers to the movement of a gas into and/or out of the lungs.
What is ventilation?
Perfusion is the process by which blood flow allows for the facilitation of gas exchange.
What is perfusion?
Diffusion The movement of gases across the alveolar-capillary membrane.
What is diffussion?
Oxyhemoglobin A description of hemoglobin bound with oxygen.
What is oxyhemoglobin?
It is said that affinity is the ability of the hemoglobin molecule in binding oxygen in the
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