Pulmonary Ventilation and endurance lecture (exam 3)

Question 1

diff. between respiration and ventilation?

Answer 1

respiration= actual exchanging of gasses
ventilation= act of moving diaphragm to breathe

Question 2

jobs of respiration:

Answer 2

O2 exchange
CO2 exchange
controls blood acidity
oral communication
ventilation
respiration

Question 3

Ventilation formula

Answer 3

VE= TV x frequency

Question 4

TV and RR both inc. linearly with inc. activity until what point?

Answer 4

80%, it plateaus (80% of Max HR or VO2 max?? not sure)

Question 5

Dyspnea

Answer 5

SOB

Question 6

hyperventilation

Answer 6

too much O2 coming in, blowing off too much CO2, inc. blood pH (more basic)

Question 7

valsalva maneuver

Answer 7

traps air in lungs and increases thoracic pressure too much so that puts pressure on heart and heart has dec. cardiac output, dangerous, ppl pass out so the stupid person will breathe out and the heart can get its room back

Question 8

ventilatory ratio at rest?

Answer 8

23-28 L of air breathed per L of O2/min

Question 9

ventilatory ratio at max exercise?

Answer 9

30

Question 10

anaerobic threshold is the point at which what happens?

Answer 10

metabolism becomes anaerobic (glycolysis)

Question 11

buffers of blood acid levels?

Answer 11

bicarbonate
lungs
kidneys (only long term option)

Question 12

how do kidneys buffer blood pH?

Answer 12

excrete H+, reabsorb bicarb

Question 13

how do lungs help buffer blood pH

Answer 13

when H+ levels are high (low, acidic, pH) u inc. ur RR and breathe off more CO2 and opposite, if ur H+ levels are low (high/basic pH) u breathe slower or sigh to retain more CO2

Question 14

how do bicarbs help buffer blood pH

Answer 14

they just buffer it…

Question 15

at initiation of exercise, how long does it take ventilation to reach “steady state”?

Answer 15

1-2 mins