Laboratory 10 & 11: Stimulated Diving and Heart Rate Prelab Questions: 1.) If the peripheral blood vessels were constricted without making any other further adjustments in the cardiovascular system then the blood vessels could potentially burst due to the built up pressure and no further decrease in heart rate. The vessels would be smaller due to the constriction but the heart would continue to pump the blood with the same or greater force. The dive response prevents this from happening
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High blood pressure in the lungs is called pulmonary hypertension or pulmonary arterial hypertension. Pulmonary hypertension is high blood pressure in the arteries starting from the heart towards the lungs. Pulmonary arterial hypertension (PAH) is defined as a sustained elevation of the pulmonary arterial pressure to greater than 25 mmHg at rest or greater than 30 mmHg following exercise‚ with a mean pulmonary-capillary wedge pressure (an indirect measure of left atrial pressure) of less than 15
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Does Exercise Affect Blood Pressure and Heart Rate? Hypothesis If an individual is put through vigorous exercises‚ then his/her blood pressure and heart rate will be affected because of the increase in activity. Dependent Variables Heart Rate (measured in bpm) Blood Pressure (measured in mmhg) Independent Variables Height Weight Physical Fitness Speed on completing exercise Controlled Variables Types of Exercise Materials Cufflink Heart Monitor Test Subjects 1-5 Procedure
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worksheet Interactive Physiology Worksheet: Cardiovascular System: Cardiac Cycle differences of blood pressure 1. Valves open in response to ______________________________________ on their two sides. 2. List the chambers/vessels that the four valves connect: Chamber Right ventricle Left ventricle Valve Pulmonary semilunar Aortic semilunar Chamber/Vessel Pulmonary trunk Aorta Left atrium Mitral Left ventricle Right atrium Tricuspid Right ventricle mid to late
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Introduction: What is Blood Pressure? Blood Pressure can be defined as the force per unit area exerted on a vessel wall by the contained blood in the heart‚ and is measured by millimeters of mercury (mm Hg) (Marieb‚ 703). Each time the heart beats (which is about 60-70 times a minute at rest); it pumps out blood into the arteries. There are two types of pressure recorded that can determine your blood pressure. Your blood pressure is at its highest when the heart beats‚ pumping the blood.
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Blood pressure is the measure of the pressure against the walls of the arteries. There are two forces that form blood pressure. One of the forces is created when the heart pumps blood into the arteries through the circulatory system. The other force is due to the arteries as they resist the flow of blood. Blood pressure is always stated in two numbers‚ systolic pressure and diastolic pressure. The higher number is systolic pressure which represents the pressure while heart contracts to pump the blood
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a) As the veins are responsible for returning deoxygenated blood to the heart‚ they are most often working against gravity. The blood is prevented from reversing direction through large venous valves. However‚ if the pressure applied downwards on these valves is great enough and applied for a significant period of time‚ such in the case of prolonged periods of standing‚ the edges of the veins can become distended and eventually prevent the edges of the valves from successfully sealing. Varicosities
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There are several good reasons to consider having your varicose veins removed. The most popular reason is appearance. Unless your legs and ankles are covered with clothing all of the time‚ your varicose veins will show. If they are severe‚ you may feel self-conscious and conceal your legs. This is the number one reason people want to remove their varicose veins. Varicose veins develop because the veins become weak and do not function properly to push the blood up the legs‚ against gravity back to
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Fainting Definition Fainting is a generally brief and unexpected loss of consciousness from a lack of blood flow to the brain followed by the return to full wakefulness (Appendix A) . This loss of consciousness is accompanied by loss of muscle tone that can result in falling or slumping over. Cause of fainting There are so many causes of fainting‚ which makes identifying cause difficult at times. Some common causes are extreme emotional stress‚ too little food or drink resulting in low blood
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Title: A comparison between the fitness of smokers and non-smokers. Introduction: When smoking tobacco‚ the blood vessels are being constricted (why???Mention how this happens)‚ which raises the blood pressure and causes hypertension that can lead to heart attacks. Consuming tobacco furthermore damages the lungs and its capacity. (say how it damages lung capacity and what effects it has on the human‚ when the lung capacity is damaged.) With this experiment I want to investigate how smoking affects
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