Exercise at altitude

Question 0

Altitude training produces what responses?

Answer 0

Increased blood volume- erythropoietin- kidneys- stimulates bone marrow- increased erythrocyte production

Question 1

Acute exposure to altitude significantly alters the blood by:

Answer 1

Reducing blood plasma
Increasing RBC count
Increasing transport of O2 per ml of blood

Question 2

VO2max …. at altitude due to …., primary due to ….

Answer 2

Decreases
Decreased PO2 diffusion gradient
Unchanged extraction but reduced delivery of O2- arterial O2 lower

Question 3

Submaximal oxygen uptake during exercise at altitude would be:

Answer 3

Decreased at the same relative intensity

Similar at the same absolute intensity

Question 4

Oxyhaemoglobin desaturation curve describes:

Answer 4

The % saturation of the arterial blood at different PO2

Question 5

The oxyhaemoglobin desaturation curve …. at altitude and enables …. of oxygen at the tissues

Answer 5

Shifts to the left

Greater arterial saturation at various PO2

Question 6

Acute hypoxia leads to:

Answer 6

Hypoxeamia
Increased respiratory drive via hypothalamus
Increased tidal volume and respiratory rate

Question 7

Hypobaria is:

Answer 7

Content of all gases low- usually at high altitude

Question 8

Acid-base balance altered at altitude, causing:

Answer 8

Hyperventilation- decreasing arterial PCO2

Increasing blood pH- positive impact on oxyhaemoglobin desaturation curve (shift to left)

Question 9

During maximal work oxygen delivery and uptake impaired because:

Answer 9

<diffusion gradient at muscle level