KINE 433 exam 1 Woodman (summer)

cardiovascular, respiratory, and

two circuits of the cardiovascular system

pulmonary circuit: blood flow from heart to lungs

systemic circuit: blood flow from heart to rest of body’s tissues (entire body)

which circuit is low pressure vs high pressure? why the difference?

the pulmonary circuit is low pressure (20-30mm/Hg)- only is moving blood to lungs which are right next to heart (behind)

the systemic circuit is high pressure (100-140 mm/Hg)- needs higher pressure to move blood to whole body and work against gravity when taking blood to the brain

Macrocircualtion vs Microcirculation - how it is determined and what are the specefic jobs

*based on location more than it is size (physiologist use location as a determinant)

Macrocircualtion: outside of the tissues- arteries and veins (larger vessels).

• job: suited for providing blood flow to and from tissues

Microcirculaiton: inside/within organs, and exchange site- arterioles, capillaries, and venules

• job: regulate BP and BF

  • capillaries role= regulate exchange

the three circulatory adjustments to exercise

1.) increase cardiac output (CO)→ increases HR and SV

2.) redistribute CO→ more blood flow to tissues that need it during exercise, the arterioles adjust this

3.) Venous return must match CO→ blood in=blood out; precisely matched regualted by the veins