Flashcards in PULMONARY CIRCUIT DURING EXERCISE Deck (18)
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1
PULMONARY CIRCUIT
- during exercise
2
blood flow (CO)
- LARGE INCREASE
3
pulmonary arterial pressure
- SLIGHT INCREASE
- mostly NORMAL
4
pulmonary vascular resistance
- LARGE DECREASE
- flow is inverse to resistance
5
pulmonary blood volume
- INCREASE
- due to increase in CO
6
number of perfused capillaries
- INCREASE
- for better exchange in the lung
- increase Oxygenation
7
capillary surface area
- INCREASE, which means INCREASED rate of gas exchange
8
smoker
- pulmonary hypertension
- increase lung marking in the X-ray
9
systemic circuit ARTERIAL SYSTEM
- PO2 NO CHANGE, fully saturated
- PCO2 no change, increase ventilation proportional to increase metabolism
- pH no change, or decrease due to production of lactic acid, extreme exercise decrease pH due excessive production of lactic acid causing muscle cramps extracellular to intracellular, electrolyte shift
- MAP slight increase
- body temp. slight increase
- blood flow LARGE INCREASE
- vascular resistance (TPR) LARGE DECREASE due to release of lactic acid, due to dilation of skeletal muscle beds
10
systemic circuit VENOUS SYSTEM
- PO2 DECREASE, due to increase extraction
- PCO2 INCREASE, due to metabolism
11
during exercise
- INCREASE SYSTOLIC PRESSURE
- DECREASE DIASTOLIC PRESSURE
= MEAN PRESSURE SAME
12
exercising muscle
- blood flow INCREASE
- vascular resistance DECREASE due to release in lactic acid
- capillary pressure INCREASE due to increase in flow
- capillary filtration INCREASE, due to increase hydrostatic pressure
- lymph flow INCREASE
- venous PO2 DECREASE and can reach extremely LOW levels
- extraction of oxygen INCREASE
13
Cutaneous blood flow
- initially DECREASE, then INCREASE to dissipate heat
14
Coronary blood flow
- INCREASE due to INCREASE IN VOLUME WORK of the heart
- due to increase in ADENOSINE
15
cerebral blood flow
- no change due to unchanged arterial CO2
16
renal blood flow
- decrease in the splanchnic circuit
17
heart
- increase volume work
- increase HR, increase metabolism, increase production of ADENOSINE, causing increase in coronary flow
- preload normal in light and moderate exercise
- preload increase in heavy exercise
18
