Test 2.3 Flashcards
Factors effecting SV
End diastolic volume
End systolic volume
Vessel functions to control
Distribution of blood
Blood pressure
Blood exchange
What are the five classes of vessels
Arteries Arterioles Capillaries Venules Veins
What do arteries do
Move blood away from heart
What does arterioles do
Similar to arterioles
Resistance vessels
What do capillaries do
Exchange vessel
What do venules do
Collect blood from capillary vessel
What do veins do
Take blood to the heart
What does lumen mean
Empty space where blood moves through
How are vessels arranged
In parallel circuits
What do beds do?
Allow more flow with less pressure also promotes exchange
What percent are beds perfused at
25%
What happens if capillary beds are not used
Sphincter are shut
What is the percentage of blood distribution in the heart, arteries, capillaries, veins
Heart 7%
Arteries 13%
Capillaries 17%
Veins 64%
What are the characteristic of smooth muscle cells
Involuntary control Mononucleate Spindle shape Non-striated No myofibrils, sarcomere, t-tubules
