Questions?

Question 1

If flow goes from high pressure to low, why is there no opening of semilunar valves -> because aortic pressure is alway higher than atrial and there is some blood left over after pushing it into lungs/body

Question 2

How do valves detect change of pressure?

Question 3

What makes the alveoli tend to collapse, besides pressure in smaller alveoli? is it moistness and water that makes alveoli want to come closer together

Question 4

Respiratory ventilation-perfusion: Why is partial pressure high in areas of low blood flow-> is it automatically because the partial pressure of CO2 is low?

Question 5

more dead space, less O2 in alveoli? in emphysema

Question 6

CO2 is delivered to the lung through fresh air?
Why is CO2 brought into the lung? Is it to establish pressure gradient to make movement of CO2 out of the blood possible?
How is the partial pressure raised from 0.3 to 40?

Question 7

Weekly quiz 9 question 8
Does high blood pressure causes vasoconstriction or is high blood pressure a consequence of vasoconstriction?

Question 8

Respirator file slide 79: minute ventilations unit is (L /min) and is equal to TV * respiration rate -> those units are ml/min -> conversion needed when calculating?

Question 9

Cardiac muscle refractory periods
What happens when I flex skeletal muscle compared to cardiac muscle - shown in graph
slide 29 ch 12