Blood Vessel Structure and Function
Capillary Exchange
Local Blood Flow
Blood Pressure
Resistance
100
three types of blood vessels
What is: arteries, veins, capillaries
100
movement of gases, nutrients, or hormones from areas of high concentration to low concentration
What is: diffusion
100
formation of new blood vessels in tissues
What is: angiogenesis
100
blood pressure in arteries when ventricles contract
What is: systolic blood pressure
100
amount of friction blood experiences traveling through vessels - influences and opposes total blood flow
What is: resistance
200
three tunics composing vessel wall from deep to superficial
What is: tunica intima, tunica media, tunica externa
200
movement of large amounts of fluids and dissolved substances in one direction down a pressure gradient
What is: bulk flow
200
a "______" dilates arterioles, increasing blood flow to capillary beds, and a "______" constricts arterioles, decreasing blood for to capillary beds
What are: vasodilators and vasoconstrictors
200
difference between systolic and diastolic blood pressure - measures elasticity and recoil of arteries
What is: pulse pressure
200
three things affecting resistance of blood in the vessels
What is: viscosity, vessel length, lumen size
300
has thick tunica externa, large lumen, and collapsed wall if there's no blood in it
What is: a vein
300
two types of bulk flow
What is: filtration and absorption
300
vessel response to increase in carbon dioxide, hydrogen ions, potassium, and lactic acid
What is: vasodilation
300
average of blood pressure forces on arteries - provides index of perfusion
What is: mean arterial pressure (MAP)
300
When vessel radius decreases (vasoconstriction), flow:
What is: decreases
400
has low capacity for stretching, and high capacity for constriction and dilation
What is: muscular artery
400
draws fluid into blood due to blood proteins - opposes hydrostatic pressure
What is: blood colloid osmotic pressure
400
two organs with high degree of vascularity
What are: brain, skeletal muscle (also accepted: heart, liver)
400
movement of blood from capillaries back to heart
What is: venous return
400
if resistance increases, blood flow:
What is: decreases
500
amount of blood entering capillaries per unit time per gram of tissue
What is: perfusion
500
difference between net hydrostatic pressure and net osmotic pressure equals:
What is: net filtration pressure
500
marked increase in blood flow after temporary blood flow disruption
What is: reactive hyperemia
500
three ways in which the small pressure gradient in the veins is overcome
What are: valves, skeletal muscle pump, respiratory pump
500
blood flow "_____" directly related to pressure gradient
What is: directly
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