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Why is it important to study human cardiovascular function? not less than 5 sentences
How can people keep their cardiovascular health healthy?
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- Risks of Hypertension Eleni Rapsomaniki and her colleagues analyzed medical records of 1.25 million people in the United Kingdom to see how hypertension affects the risk of cardiovascular disorders. They looked at records of people who at 30 years old had no history of heart disease or stroke, although some had high blood pressure. By looking at which of these people later had a heart attack or stroke, the researchers were able to estimate the lifetime risks of these disorders in people with, and without high blood pressure. FIGURE 36.19 shows the researchers estimates of the lifetime risk for heart attack and for transient ischemic attack (TIA), a type of stroke. FIGURE 36.19 Lifetime risks of heart attack and TIA (a type of stroke), with and without hypertension at age 30. A transient ischaemic attack (TIA), sometimes called a mini-stroke, is caused by a temporary blockage of a blood vessel that supplies blood to the brain. Which is a person who has hypertension at age 30 more likely to have by age 60, a heart attack or a TIA?How can people keep their cardiovascular health healthy?Most humans are less than 2 meters tall. However, imagine if a human was 9 meters (almost 30 feet) tall. This would create some challenges that would require modifications to their cardiovascular system. Using your knowledge of normal human cardiovascular function, describe two ways that you could modify the cardiovascular system of a 9-meter human to accommodate their immense height (hint: think about things like gravity and blood pressure).
- Blood is pushed out of the heart through a large vessel, called the aorta. The aorta then divides into smaller and smaller blood vessels, eventually reaching vessels called capillaries. Capillaries are so small that oxygen and nutrients can diffuse across the vessel walls and into the tissues of the body, with CO2 and waste diffusing back into the blood. Let's say that the cross-sectional area of the aorta is 1 cm2 = 100 mm2. The blood pumps through the aorta at 100 mm/s but only through the capillaries at 1 mm/s. If each capillary has a cross-sectional area of 20 mm2, how many capillaries must there be in the body? Note: these numbers are not physiologically correct, but were chosen to make the math easier. The blood velocity through the aorta is closer to 300 mm/s. The capillaries have a total cross-sectional area of ~600,000 mm2 (6000 cm2), with a blood flow rate closer to 0.2 mm/s.https://www.youtube.com/watch?v=t0IngUYN2OA https://www.youtube.com/watch?v=pPxnIh_WTb8 Part1 1) How would the BP of an anxious patient visiting a doctor be different than if the patient is calm? 2) In atherosclerosis, plaque builds up inside the arteries. How would this affect BP? Is this an example of hypertension or hypotension? Part 2: The circulatory system has 5 functions. · Highlight the statements below that are only functions of the circulatory system. It carries cells that help to fight diseases. It gives structure and support to the body. It carries waste products to the urinary system. It carries carbon dioxide from cells to the lungs. It maintains body posture. It carries nutrients from the digestive system to other cells. It carries oxygen from the lungs to other cells. · The list gives some structures in the blood and circulatory system. Heart, artery, red blood cell, ventricle, capillary, plasma, vein, white blood…Which of the following is not a function of the cardiovascularsystem?a. transport oxygen to tissues and remove waste materialsb. allow for the detection of stimuli from the external environmentc. participate in temperature homeostasisd. transport cells of the immune system
- Chapter 11: The Cardiovascular System #40 Please answer the question in a simple and very comprehensive explanation of the given situation. Thank you!My instructor has told us that dehydration leads to a drop in blood pressure due to low blood volume. I don't understand this concept because I thought dehydration leads to thicker blood which meant your heart had to work harder, i.e. higher blood pressure. Could you explain how it leads to LOW blood pressure instead?A patient was admitted to the hospital with chest pains. On admission, his pulse was 110 and his blood pressure was 96/64. According to his history, his normal pulse rate is usually between 80 and 88 and his blood pressure runs from 120/70 to 130/80. 1. Are these changes in Blood Pressure and Heart Rate a reason for concern? Why or why not?
- Which of the following is not included in the blood plasma? a) Sodium ions b) Water c) Urea d) Nitrogen gas e) PlateletsWhat is the primary reason for why pulse pressure increases with aging? a. Decrease in the number of capillaries b. Aortic compliance decreases c. Speed of blood ejection from the aorta decreases d. Stroke volume decreases e. Heart rate decreasesIs it necessary to monitor our heart rate? Why or why not? Explain your Answer
