Module 7

Question 1

```

Blood Flow to Liver/Kidneys/SK Muscle

think about percentage

Answer 1

Liver and kidneys = 50%
SK Muscle = 15-20%

blood flow redirected from non-active like liver/kidneys to SK muscles

Muscles receive 80-85% during exercise

Question 2

Poiseuille’s Law

Answer 2

Resistance and radius of vessel towards resistance to flow

relationship between resistance and radius of vessels

Question 3

Q impact from exercise

Answer 3

5 L/min to 25-30+ L/min

more blood and O2 to working muscles

Question 4

How much blood can a fully dilated BV hold?

Answer 4

20L of blood (4x more than normal volume)

constriction = decreased blood flow

Question 5

Exercise effect on arterioles

what 2 factors impact this

Answer 5

1. autoregulation (local metabolites act on arterial wall)
2. Extrinsic Neural Control (stiffen vein

metabolites detected by arterial, causing dilate or constrict

Question 6

What happens to body (extrinsic neural control)

think about arterioles and blood flow

Answer 6

SNS stimulation and release of hormoens such as epinephrine or norepinephrine

extrinsic = hormones while autoregulation = metabolites

Question 7

Functional Sympatholysis

Answer 7

SNS activity still increases to skeletal muscles but action is modulated/inhibited by local metabolites to blunt constriction