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Resistance vessels, primarily arterioles, are responsible for regulating blood flow and maintaining blood pressure by providing resistance to blood flow. They have muscular walls that can constrict or dilate, thus controlling the distribution of blood. In contrast, capacitance vessels, mainly veins, serve as reservoirs for blood storage, holding a larger volume of blood with thinner walls and less muscle. They can expand to accommodate varying blood volumes, thus influencing venous return to the heart.
What else can I help you with?
Are arteries often referred to as capacitance vessels?
No. Capacitance vessels refer to site where most volume of blood is found. Veins are capacitance vessels.
Which vessels are called capacitance vessels?
Veins are considered capacitance vessels because they collect 60-70% of the blood in systemic circulation. Small arteries and arterioles are considered resistance vessels because they represent where pressure is more greatly reduced.
What is mechanism of action of prazosin?
Prazosin blocks alpha-1 receptors (post synaptic) reversibly, permitting vasodilation of both resistance (arterial) and capacitance (veinous) vessels.
What are conductance vessels?
Conductance vessels, also known as resistance vessels, are the small arterial blood vessels in the circulatory system that regulate blood flow by controlling the resistance to blood flow. They are primarily responsible for distributing blood flow to different tissues and organs based on their metabolic needs. Constriction or relaxation of conductance vessels helps to regulate blood pressure and maintain proper tissue perfusion.
Is systemic veins considered capacitance vessels?
yes - it means that they store/hold a lot of blood.
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).
What vessels in the respiratory system are called the resistance vessels?
Bronchioles
What blood vessels have the greatest capacitance ad serve as a reservoir for blood volume?
veins and venules
What are the factors that determine vascular resistance?
The factors that determine vascular resistance include the radius of the blood vessels (smaller radius increases resistance), the length of the blood vessels (longer length increases resistance), the viscosity of the blood (higher viscosity increases resistance), and the presence of any obstructions or blockages in the blood vessels.
Differences between vasodilation and vasoconstriction?
Vasodilation is relaxation of blood vessels leading to increase in lumen size. Vasoconstriction is contraction of blood vessels leading to decrease in lumen size.
What are the differences between arteries and veins and why are these differences necessary?
Arteries carry blood from the heart to other parts of the body. Veins are much smaller vessels that are used to bring the blood back to the heart.
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.
