Blood Vessels Flashcards By Kate C | Brainscape ~ BuzzFeed Blog

Sunday, May 9, 2021

Blood Vessels Flashcards By Kate C | Brainscape

Vessel resistance (R) is directly proportional to the length (L) of the vessel and the viscosity (η) of the blood, and inversely proportional to the radius to the fourth power (r 4).. Because changes in diameter and radius are directly proportional to each other (D = 2r; therefore D ∝ r), diameter can be substituted for radius in the following expression.Answer and Explanation: The correct answer is option (d) blood vessel diameter Blood vessel diameter is the most significant source of blood flow resistance. A decrease in vessel diameter increases...Atherosclerosis is a disease in which plaque builds up inside your arteries. Over time, plaque hardens and narrows your arteries. Learn more about causes, risk factors, screening and prevention, signs and symptoms, diagnoses, and treatments for atherosclerosis, and how to participate in clinical trials.39) Select the correct statement about blood flow. A) It is relatively constant through all body organs. B) It is measured in mm Hg. C) It is greatest where resistance is highest. D) Blood flow through the entire vascular system is equivalent to cardiac output.Which of the following is NOT an important source of resistance to blood flow? total blood volume. 12. Which of the following is the most significant source of blood flow resistance? blood vessel diameter. 14. Select the correct statement about blood flow. Blood flow through the entire vascular system is equivalent to cardiac output. 15.

Which of the following is the most significant source of

Veins are more compliant than arteries and can expand to hold more blood. When vascular disease causes stiffening of arteries, compliance is reduced and resistance to blood flow is increased. The result is more turbulence, higher pressure within the vessel, and reduced blood flow. This increases the work of the heartwhere r = inside radius of the vessel, L = vessel length, and η = blood viscosity. It is important to note that a small change in vessel radius will have a very large influence (4th power) on its resistance to flow; e.g., decreasing vessel diameter by 50% will increase its resistance to flow by approximately 16 fold.A) provides information about the resistance of blood vessels. B) indicates the force of ventricular contraction. C) indicates the force of atrial contraction. D) is normally higher than the systolic blood pressure. E) indicates the cardiac output.Arterial plaque clogs the arteries, limiting or stopping blood flow. Arterial plaque changes the direction of blood flow, which forces oxygenated blood to the heart. Arterial plaque changes the size of blood cells, which prevents blood from flowing in the arteries. Arterial plaque clears the arteries, increasing blood flow.

Atherosclerosis | NHLBI, NIH

Resistance. Resistance to flow must be overcome to push blood through the circulatory system. If resistance increases, either pressure must increase to maintain flow, or flow rate must reduce to maintain pressure. Numerous factors can alter resistance, but the three most important are vessel length, vessel radius, and blood viscosity.Which of the following is the most significant source of blood flow resistance. The contraction and relaxation of the smooth muscle in their walls can change their diameter. Which of the following is the most significant source of blood flow resistance.Blood flow is slowest in the capillaries, which allows time for exchange of gases and nutrients. Resistance is a force that opposes the flow of a fluid. In blood vessels, most of the resistance is due to vessel diameter. As vessel diameter decreases, the resistance increases and blood flow decreases.Blood flow through the entire vascular system is equivalent to cardiac output. It is measured in mm Hg. It is greatest where resistance is highest. Blood flow through the entire vascular system is equivalent to cardiac output.A. Reduction of airway resistance B. Improvement in arterial blood gas values Which of the following is the most likely source of the infections? A. The ventilators B. The personnel B. Reduce gas flow C. Increase expiratory resistance D. Use a smaller reservoir A.