Be able to describe how blood flow and pressure are affected blood vessel size (radius). Know the Poiseuille-Hagan equation and how to predict changes in flow with changes in conditions
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Be able to describe how blood flow and pressure are affected blood vessel size (radius).
Know the Poiseuille-Hagan equation and how to predict changes in flow with changes in
conditions
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Solved in 3 steps
- Hemodynamics are the dynamics of blood flow. Can the Bernoulli's equation be used to study hemodynamics in the cardiovascular system? Why or why not? You should discuss all four of the assumptions of Bernoulli's equation when answering this question. Jugular vein (also subclavian vein from arms) Pulmonary artery Superior vena cava Interior vena cava Hepatic vein Liver Hepatic portal vein Renal vein Iliac vein CO₂ CO₂ Head and arms Lungs Heart Kidneys Trunk and legs Carotid artery (also subclavian artery to arms) Pulmonary vein Aorta Hepatic artery Mesenteric arteries Digestive tract Renal artery Iliac arteryCan you please explain how to use this equation to get Flow(ml/min) Blood flow = π ΔP r4 / 8LvBlood Flow (BF)= (diff. in) Pressure (P) /Resistance (R) Assign these numbers to the equation above: If 6/3=2, when you increase 3, what happens to 6 in order to get 2 to stay the same?
- Determine the rhythm, rate and mean electrical axis of the ECG tracing. Estimate the axis. Show your solution.During exercise, arterial blood pressure changes very little. However, cardiac output may double and blood flow to exercising muscle may go up 10-fold, while at the same time the blood flow to kidneys may decline by nearly 50%. Explain possible mechanisms that might account for these very different changesExplain the nature of blood flow and pressure regulation in the following system; the capillary system and venous system
- Explain how the Starling forces regulate bulk flow in the capillaries using the core concept of flow-down-gradients,Explain how the cross-sectional area of vessels (in cm2, range from 0 to 5000) affects the mean linear velocity of blood (in cm/s, range from 0 to 50) and blood pressure (in mm Hg, range from 0 to 100). Hint, draw a general model of vascular structure from the aorta to the vena cava, and plot how the variables mentioned above change as blood moves along the vessel system.The patient cole is sitting on a chair. Suppose he raises his arm for a blood pressure measurement, with the cuff placed 10 cm below his heart. (a) How much of an error (difference in pressure) in mmHg does this introduce in the measurement? Assume that the blood is static for simplicity. The density of blood is 1050 kg/m3. AP = (b) If the systolic & diastolic blood pressures from the patient's heart is 125 & 85 mmHg, what will the cuff's pressure reading be? & (c) Describe a way to measure cole blood pressure accurately. 3
- Describe what is happening physiologically in each of the parts of the EKG listed: Electrocardiogram P wave- atrial depolarization QRS complex- ventricular depolarization (atrial repolarization) T wave- ventricular repolarization PR interval QT interval Tachycardia Bradycardia FibrillationWhich of the following are intrinsic factors that regulate blood flow? Choose all that apply. Vasopressin (antidiuretic hormone) Histamines and nitric oxide Metabolic activity Parasympathetic nervous system Increased carbon dioxide concentrationThe following figure models a part of blood vessel network in two different points. If blood vessel cross section at point (A) 4.5 cm2 and speed of blood at this point 40 cm/s. what is the speed of blood flow at point (B) with the cross section of 5500 cm2.
