Capillary circulation Flashcards
1
Q
How is blood flow regulated through capillaries?
A
Vasomotion via contraction of metaarterioles and precapillary sphincters
2
Q
Can capillaries contract or relax?
A
No
3
Q
What is the main stimulus for (increased) skeletal muscle blood flow regulation?
A
Decreased pO2 (hypoxia)
4
Q
What is the main stimulus for (increased) brain blood flow regulation?
A
Increased pCO2
5
Q
What is the main stimulus for (increased) heart blood flow regulation?
A
Increased adenosine
6
Q
How is filtration affected if hydrostatic pressure is greater than oncotic pressure?
A
Net filtration (fluid moves out of capillaries)
7
Q
What is the function of lymph with respect to interstitial pressures?
A
Keeps interstitial pressures low
