Exercise and blood flow through special regions

Question 1

How is blood distributed in the lungs?

Answer 1

Decreased alveolar O2 reduces local alveolar blood flow

Question 2

When is coronary perfusion?

Answer 2

During diastole because the arteries are less constricted

Question 3

What does the right coronary artery supply?

Answer 3

• Walls of the RA and RV
• SA and AV node
• Posterior part of the interventricular septum
• Small areas of LA and LV

Question 4

What does the left cornonary artery supply?

Answer 4

• Walls of the LA and LV

- Most of the interventricular septum including AV bundle `

Question 5

How much does cardiac output increase by during strenous exercise?

Answer 5

6-9x

Question 6

What is the primary controller of coronary blood flow?

Answer 6

Local metabolism