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CCBC Nursing 160 Exam Four Prep Questions And Answers
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CCBC Nursing 160 Exam Four PrepQuestions And Answers
What is Oxygenation? -Answer The process that maintains oxygen levels necessary for
the survival of living cells.
*The body requires oxygen for ENERGY!*
How much of the air that we breathe is made up of oxygen? -Answer 21% air.
*But oxygenation is not JUST the air we breathe! Also the level of exchange at the alveoli
and at the level of the tissues.*
What is the waste product of oxygenation? -Answer CO2!
What is hypoxemia? -Answer It refers to the levels of oxygen being abnormally low in the
blood.
What is hypoxia? -Answer It refers to an insufficient or low level of oxygen to the whole
body, tissues.
What is oxygen delivery? -Answer It is defined as the rate of transport of oxygen from
the lungs to the tissues of the body.
What is oxygen consumption? - Answer The rate at which oxygen is removed from the
blood to be used by the tissues.
, Can changes in systemic oxygenation affect other systems of the body? - Answer YES!
Changes in O2 can affect EVERY body system! Ex:
1. Homeostasis: acid-base balance altered-should always have 20 bicarbs to every 1
carbonic acid.
2. Perfusion: need good blood supply to deliver O2 to the tissues.
3. Metabolism: changes in O2 can increase metabolic demand, thus leading to
compensation.
What is involved in the physiology of Oxygenation? - Answer 1. Oxygen transport: occurs
because we breathe! We take in oxygen through respirations.
2. Respiration: the act of respiring; inhalation and exhalation of air;
breathing---GAS EXCHANGE.
3. Ventilation: the movement of air between the
environment and the lungs through inhaling and exhaling (basically the same as
respiration--the two go hand in hand).
4. Diffusion and Perfusion: O2 diffuses across alveoli and membranes.
5. Gas exchange: takes place at the level of the alveoli!
What are the types of *Protectants* involved during Oxygenation? - Question 1.
*Filtration*: ex, cilia catch debris and irritants from obstructing the airway.
2. *Warmth and Humidification*: the upper airway- mouth and nose warms and
humidizes. Patients with trachs do not have this capability, thus it can cause irritants to
their respiratory system.
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