Flashcards in Chapter 20 Deck (72)
term for the flow of blood through a tissue or an organ
where is blood flow the slowest?
where is blood flow the fastest?
the formation of more blood vessles
the major local factor causing dilation of arterioles
Nitric oxide (NO)
the dilation and relaxation of blood pressure
Any condition in which blood vessels are inadequately filled and blood cannot circulate normally
results from large-scale blood loss
results from extreme vasodilation and decreased peripheral resistance
results when an inefficient heart cannot sustain adequate circulation
what does long term autoregulation of tissue perfusion depend on?
how much can muscle blood flow increase by during physical activity?
what can a MAP in the brain below 60 mm Hg cause?
what is syncope?
what can a MAP in the brain above 160 cause?
what goes on in the heart during ventricular systole?
Coronary vessels are compressed
Myocardial blood flow ceases
Stored myoglobin supplies sufficient oxygen
what happens to the left over fluid that is not returned to the capillary?
it will be drained by the lymphatic system
5 parts of the Aorta
largest artery of the body
what supplies 80% of the brains blood
the internal carotids
5 main veins of the forearm
3 veins of the upper arm
2 deep veins of the lower leg
Anterior Tibial Vein
Posterior Tibial Vein
2 superficial veins of the lower leg
Small saphenous vein
Great saphenous vein
what do the internal and external iliac veins unite to form?
Common iliac Vein
2 types of short-term auto regulation of tissue perfusion
how does metabolic control work?
by making changes to the chemical environment
how does myogenic control work?
by making changes in muscles tone of the arterioles
The Frank Starling Law
The greater the stretch of the cardiac muscle cell, the greater the force of contraction.