PHSI3011 07-1 Cardiorespiratory adaptation to high altitude

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PHSI3011 07-1 Cardiorespiratory adaptation to high altitude
Michael Jardine
Quiz by Michael Jardine, updated more than 1 year ago
Michael Jardine
Created by Michael Jardine almost 7 years ago
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Resource summary

Question 1

Question
Label the following:
Answer
  • Atmospheric air
  • Inspired air
  • Alveolar gas
  • Arterial blood
  • Mixed venous blood

Question 2

Question
True or false: Hypoxia (measured in the Carotid artery) triggers an increase in respiratory activity, which in turn increases ventilation. In response to the nasopharyngeal (diving) reflex (yeah, wrong lecture. whatevs), this is absent.
Answer
  • True
  • False

Question 3

Question
True or false: Pulmonary stretch receptors influence the cardiovascular system as part of the Hering-Breuer reflex.
Answer
  • True
  • False

Question 4

Question
Hypoxia causes both EXCITATION (secondarily, from pulmonary stretch receptor activity) and INHIBITION (primarily, from chemoreceptor activity) of HR. At high altitude altitude, what is the NET effect?
Answer
  • Excitation
  • Inhibition

Question 5

Question
Hypoxia causes both EXCITATION (secondarily, from pulmonary stretch receptor activity) and INHIBITION (primarily, from chemoreceptor activity) of Vascular Resistance. At high altitude altitude, what is the NET effect?
Answer
  • Excitation (so secondary vasoconstriction)
  • Inhibition (so primary vasodilation)
  • Excitation (so primary vasoconstriction)
  • Inhibition (so secondary vasodilation)
  • Excitation (so primary vasodilation)
  • Inhibition (so primary vasoconstriction)
  • Excitation (so secondary vasodilation)
  • Inhibition (so secondary vasoconstriction)

Question 6

Question
The NTS is where the quite a few of the baroreceptors and chemoreceptors lead to. What is it, though? NTS = ??
Answer
  • Nucleus of Solitary Tract (NTS)
  • Nucleus Tractus Solitarii (NTS)

Question 7

Question
Fill in the two arrows.
Answer

Question 8

Question
What is it that moves the curve to the blue one?
Answer
  • 2-DPG
  • Erythropoietin

Question 9

Question
Over prolonged exposure to high altitude (a few days or more), production of __________ increases. The effect of this is to maintain O2 unloading in capillaries, despite reduction in inspired PO2.
Answer
  • 2-DPG
  • 2-BPG
  • 2,3-DPG
  • 2,3-BPG
  • RBC production

Question 10

Question
Hypoxia at high altitude results in [blank_start]__________[blank_end] Blood-brain barrier permeability and Cerebral [blank_start]__________[blank_end].
Answer
  • Increased
  • Decreased
  • Vasodilation
  • Vasoconstriction
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