CV Response to Physical Distress--Nordgren

Question 1

How does respiratory activity affect CV system?

Answer 1

inhilation: -7 mmHg
exhalation: -2 mmHg

intrathoracic pressure

Question 2

Respiratory pump

Answer 2

inhalation decreasing intrahoracic pressure from baseline

allows vessels to expand

when expire, pushes blood forward back into heart

Question 3

Exercise exaggerated breathing

function

Answer 3

exaggerate respiratory pump

Question 4

Yawning exaggerated breathing

function

Answer 4

major decrease in intrathoracic pressure

increased venous return

especially with stretching

Question 5

Valsalva

Answer 5

pressing with closed glottis

Question 6

Why do you pass out if you lock your knees?

Answer 6

not using skeletal muscle pump

10-20 min

Question 7

Consequences of long-term bed rest

Answer 7

distension of head and neck veins, facial edema, nasal stiffness, decreases in calf girth and leg volume

Question 8

Delayed response to long-term bedrest

Answer 8

reduced renal sympathetic drive

hypovolemia

fainting upon standings

Question 9

Chronic exercise results

Answer 9

decrease HR

increase SV

increased efficiency of heart

Question 10

Reactivce hyperemia in exercise: when?

Answer 10

anaerobic activities

Question 11

Why do pregnant women have a 50% increase in blood volume?

Answer 11

since R is lowered signifigantly, increase in volume is necessary to maintain proper CO

Question 12

Fetal lungs are…

Answer 12

collapsed