The human heart pumps blood through the arteries, which connect to smaller arterioles and then smaller capillaries. In this assignment, we will discuss the arterial blood pressure from several aspects, include definition, normal values for blood pressure, the most important factors affecting it, the mechanism involved in arterial blood pressure regulation, and the relevance between the pressure and the eye. Definition of blood pressure, it’s Normal value, and the factors that determine arterial blood pressure under physiologic conditions. Blood pressure refers to the force exerted by the blood against the inner walls of the blood vessels . This pressure produces when the heart contracts during the heartbeat cycle, which forces blood out
The bag is then inflated until the air pressure in the cuff overcomes the arterial pressure and obliterates the arterial lumen. This is confirmed by palpating the radial pulse that disappears when the cuff-pressure is raised above the arterial pressure. The pressure is then raised further by 20 mm Hg and then slowly reduced. When the pressure in the cuff reaches just below the arterial pressure, blood escapes beyond the occlusion in to the peripheral part of the artery and the pulse starts reappearing. This is detected by the appearance of sound heard in the stethoscope and pressure at which the sounds are first heard is the systolic pressure.
How would the resistance of Cari’s airways be affected by excess mucus and fluid in her lung? The excess mucus and fluid in the lungs would increase the resistance of Cari’s airways because of the small diameter the buildup would cause and the fluid would have some alveoli underwater where they can’t function properly causing more friction from the buildup. 5. How would Cari’s lung compliance be altered as her alveoli fill with fluid due to pneumonia? Cari’s lung compliance would increase from trying to force gases in and out of the alveoli that are filled with fluid.
As the blood leaves the ventricles, the pressure in the aorta and pulmonary artery surpasses the ventricular pressure. Consequently, the semi lunar valves shut and the chordae tendineae attached to the valves prevent them from inverting, thus preventing back-flow. The shutting of these valves can be heard as the second heart beat (S2). At this point, the ventricles are in isovolumic ventricular relaxation as both sets of AV valves and semilunar valves are closed. Both the T wave and P wave are similarly shaped but they represent different phases of the cardiac cycle, repolarisation and depolarisation
What is High Blood Pressure? Blood pressure is a measure of how hard the blood pushes against the walls of your arteries as it moves through your body. It’s normal for blood pressure to go up and down throughout the day, but if it stays up, you have high blood pressure. Another name for high blood pressure is hypertension. When blood pressure is high, it starts to damage the blood vessels, heart, and kidneys.
Blood Pressure Blood pressure is the force created by the heart as it pushes blood into the arteries and the circulatory system. When the heart pumps, it causes blood to flow through the arteries and into the arterioles. As the blood goes through the arterioles, the arterioles either contract or expand altering both the amount of blood flow and the resistance to blood flow. If the arterioles remain in a contracted form, they create high blood pressure. The heart must then pump harder because the arterioles are exerting a greater resistance to blood flow.
1) Coronary artery disease occurs when fatty deposits called plaque build up inside the coronary arteries. The coronary arteries wrap around the heart and supply it with blood and oxygen. When plaque builds up, it narrows the arteries and reduces the amount of blood that gets to your heart. This can lead to serious problems, including heart attack. 2) Coronary artery disease is usually caused by a build-up of fatty deposits on the walls of the coronary arteries.
Here are a few examples of when the arteries expand, when a person is climbing stairs, exercising, or having sex. The heart is deprived of oxygen when the arteries are unable to expand. Healthy coronary arteries are clean, smooth, and slick. When the heart needs to work harder the artery walls are flexible and can expand to let more blood flow through. Having unhealthy coronary arteries makes it harder to perform everyday tasks and to perform your job the way you need to.
Overproduction of CSF Intracranial pressure rises if production of CSF is more than absorption. One possible cause is that CSF may be overproduced. In this case resistance to CSF flow, or venous sinus pressure may be increased as a result. CSF production will decrease as ICP rises. The brain compensates by absorption of CSF across ventricles.
Homeostasis is known as the maintenance of a constant internal environment despite external changes or stimuli in references to exercise. When the muscles in your body contract, the glucose will be used up so in order for the blood glucose levels to be maintained stimuli changes the blood glucose concentrations. Negative feedback increases blood glucose levels by secreting glucagon, the alpha cells in pancreas this stimulates the liver to convert glycogen into glucose, which is then released and absorbed by the cells in the body. Homeostasis is changing to the environment. During exercise our body undergoes a lot of changes.