Physio 9.0 Cardio Lab Report Essay

Poiseuille’s law states the volume in a tube is directly proportional to pressure difference between both ends of the tube and inversely related to the length. Poiseuille’s law was discovered by Jean Louis Marie Poiseuille in 1840 (Poiseuille’s). Jean Louis used his experiments to find the smooth, laminar flow in circular tubing (Jean-Louis). His findings can be described as the flow of blood through the body and bronchial smooth muscle.

33. The Frank-Starling law of the heart states that stroke volume is proportional to what? Volume of blood filling in the heart

Deacreased vascular resistance and increased arterial pressure causes an increase in blood flow. This is important to supply organs with oxygen. 4. Restate your predictions that were correct and give data from your experiment that support them. Restate your predictions that were not correct and correct them with supporting data from your experiment. MAP would increase due to increase in activity, SVR would decrease due to decrease in resistance, CO would increase due to more force of blood being expelled.

4) Compare and contrast oscillations in heart rate observed at rest (Activity 1), during exercise and recovery exercise (Activity 2). Is the relative magnitude of the oscillations the same? Provide a physiological explanation in your answer.

The hydrostatic pressure (or blood pressure) and osmotic pressure (water pressure) are responsible for balancing and creating the movement of fluid across the capillary wall.

What impact does the illness have on the blood’s ability to clot? Include the role of vitamin K and the specific clotting proteins affected. Also discuss platelet production. Describe the test that is typically run to test the blood’s clotting ability.

6. Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions

B. Part B. PowerPhys Experiment 4 – Effect of Exercise on Cardiac Output (13 points total)

29. If all the 280 million molecules of hemoglobin contained in RBCs were free in the plasma,

Q6a. You were instructed to use an inviscid flow model. Justify the use of that model for this calculation. (2 marks)

(c) Estimate the EC50 values for the effects of acetylcholine and nitroprusside in both types of arterial ring, and present these in a table.

Arteries - the pressure exerted on the blood from the heart; the fact that there's always more blood behind pushing blood forwards; the elastic recoil of the arteries

An aneurysm is a focal dilation or outpouching of a blood vessel, although it can also occur in one of the cardiac chambers and it is more common in arteries rather than in veins. It is justified if the localized dilation is above 50% of the normal lumen (Attenberg, 2011). The expect diameter is based on gender, age and other factors, such as body size (Johnston, 1991). A true aneurysm is defined by a weakening of the vessel wall and involves the three layers of an artery: tunica intima, media and adventitia. The Laplace’s law is a formula that relates some key factors about the hemodynamics and according to that, the wall tension required to withstand a certain internal fluid pressure is directly proportional to the vessel radius and inversely

There are sensors in the walls of the arteries that detect blood pressure which in turn sends signals to the heart and arterioles, the veins, and kidneys that cause them to increase or decrease blood pressure as needed. The heart can speed up and/or eject blood more forcefully with each contraction. Veins narrow to return more blood for pumping. Arterioles narrow to increase resistance to blood flow.

The second compensatory mechanism is increased preload via renal conservation of sodium and water that is caused by the activation of the renin-angiotensin-aldosterone system. Increased blood volume means improved venturical filling and thus causing increased stroke volume, which increases the pressure exerted on the artery walls. Prolong increase stroke volume can overwork the heart and lead to hypertrophy. In addition, the increased extracellular volume expansion can lead to dilutional hypoproteinaemia, exacerbate third