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What factors influence resistance to blood flow?
Factors that influence resistance to blood flow include the diameter of blood vessels (smaller diameter increases resistance), length of the vessels (longer vessels increase resistance), blood viscosity (thicker blood increases resistance), and turbulence within the blood vessels (increased turbulence increases resistance).
Short term effects on blood vessels for drinking alcohol?
Alcohol acts as a vasodilator, increasing the diameter of blood vessels.
Explain relationship between the diameter of vessels and the velocity of blood?
As vessel diameter decreases, blood velocity increases due to the principle of conservation of flow rate. This relationship is described by Poiseuille's law, which states that blood flow is directly proportional to the fourth power of vessel radius. Therefore, smaller vessels result in faster blood flow velocities.
What is the increase of diameter in a blood vessel called?
Vasodilation: Widening of blood vessels resulting from relaxation of the muscular wall of the vessels. What widens is actually the diameter of the interior (the lumen) of the vessel. The opposite of vasoconstriction.
What happens to blood vessel size?
The size of blood vessels varies enormously, from a diameter of about 25 mm (1 inch) in the aorta to only 8 μm in the capillaries.
What blood vessels on one cell thickness?
Capillaries are the smallest blood vessels in the body (in terms of diameter), measuring about 20 micrometres (or one cell) across.
How is high blood hydrostatic produced?
High blood hydrostatic pressure can be caused by conditions such as hypertension, heart failure, or kidney disease. These conditions can lead to an increase in the pressure that blood exerts on the walls of blood vessels, which can result in high blood hydrostatic pressure.
What is the affect on blood flow on the radius vessels?
The relationship between blood flow through a vessel and the radius of the vessel can be expressed as BF=1/pi r4 (where pi is equal to 3.14.....). So a change in the radius of a vessel has a large effect on the blood flow through the vessel.
Cerebrovascular disease refers to a group of conditions that do what?
Cerebrovascular Disease refers to a group of conditions that come together to collectively affect blood flow to blood vessels in the brain, which can occur from narrowing of blood vessels and even the formation of blood clots.
When a person does strenuous exercise small blood vessels near the surface of the skin increase in diameter. This change allows the body to be cooled. These statements best illustrate?
2 homeostasic
When a person does strenuous exercise small blood vessels near the surface of the skin increase in diameter. This change allows the body to be cooled. These statement best illustrate?
2 homeostasic
Would vasoconstriction decrease peripheral resistance?
No, vasoconstriction would increase peripheral resistance. When blood vessels constrict, the diameter of the blood vessels becomes smaller, which increases resistance to blood flow. This can lead to an increase in blood pressure.
