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Flashcards in Respiratory adaptations Deck (12):
1

Anemic hypoxia
-Examples?

-Oxygen carrying capacity of the blood is reduced
-Anemia, carbon monoxide poisoning

2

How does carbon monoxide cause anemic hypoxia?

CO binds to Hb with such high affinity that it prevents O2 from binding

3

Circulatory hypoxia
-Example?

-Tissue is not receiving sufficient oxygen because the heart cannot pump the blood to the tissue
-Sickle cell leads to circulatory

4

Compare and contrast the four forms of hypoxia, including common examples of each
-Hypoxic hypoxia
-Example?

-PaO2 is below normal because the alveolar PO2 is reduced (environmental reasons such as altitude) or the blood is unable to equilibrate fully with the alveolar air
-Would occur in in lung diseases with diffusion impairments such as emphysema or fibrosis

4

Histotoxic hypoxia
-Example?

-Cells have been poisoned
-Tissue receives oxygen but is unable to use it
-Example-cyanide

5

Describe the long term changes in respiratory control that occur when hypoxia or hypercapnia becomes a chronic condition
-Long term changes with chronic hypoxia

-Choroid plexus increases H+ and decreases HCO3
-Bicarbonate moves into the blood and is excreted by the kidneys

6

Describe the long term changes in respiratory control that occur when hypoxia or hypercapnia becomes a chronic condition
-Long term changes with chronic hypercapnia

-To correct the CSF back to normal, the cells of the choroid plexus will add MORE bicarbonate to the CSF
-The H+ ion created is moved back to the blood for elimination by the kidney

7

Compare and contrast the effects of increased and decreased barometric pressure on the body
-Increased barometric pressure-effects?

-irritation of the tracheobronchial tree, nasal congestion, sore throat, coughing, muscle twitching, tinnitus (ringing in ears), dizziness, convulsions, and death
-Effects are due to formation of ROS

8

Compare and contrast the effects of increased and decreased barometric pressure on the body
-Decreased barometric pressure-effects?

Hyperventilation, alkalosis

9

Compare and contrast the effects of increased and decreased barometric pressure on the body
-Decreased barometric pressure-effects?

Hyperventilation, alkalosis

11

Compare and contrast the effects of high levels of nitrogen on the human body

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12

Compare and contrast the effects of high levels of nitrogen and oxygen on the human body
-Describe how these effects might be avoided

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