CIRCULATION LAB

CIRCULATION FOLLOW UP QUESTIONSHEART ACTIVITIES
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B) Breath Holding: When you hold your breath, your heart rate slows down because there is less oxygen in your lungs to transport.
C) Exercise: When you exercise, your breathing will become significantly faster because your tissues need more oxygen to support the extra activity.
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BLOOD TYPING
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9. Since I am A+, I have A antigens on the surface of my blood cells and so I would have anti-B in my plasma. This means that I could give blood to other people The part of the blood that is responsible for the type of blood is the antigens on the blood cells. These may be proteins, glycoproteins, carbohydrates, or glycolipids, depending on the group of blood.When you are upright, your heart rate and blood pressure tends to be higher than if you are sitting or laying down. Both my systolic and diastolic pressure changed, but neither really changed significantly when I changed positions. I think this happens because when you are standing, you are using more muscles to keep upright therefore more effort on the part of your heart, for example in your legs, back and neck. When you are sitting you are using less muscles, back and neck, so you need less oxygen than if you standing but more than if you were laying down. Laying down you are using no muscles to keep upright, therefore your heart has to work less to provide the necessary tissues with oxygen.Recovery rate is the amount of time it takes for your heart to return to normal bpm after ceasing intense exercise. A slow reduction in the number of beats per minute after exercising is healthy, but if it reduces by less than 12 bpm in one minute that may mean you have a higher risk for heart attack.The target heart rate is the desired number of beats per minute during an exercise session that enables one to get the most benefits for their body (eg. heart and lungs) and determining this number has to take into account age, gender, height, weight and previous training. It is important because when exercising you don’t want to strain your heart but you still want to get the benefits of exercising. Since an infant’s or child’s heart is much smaller than an adult heart, it has to work harder to get the same amount of blood around a body. On top of that, since children are constantly growing, their metabolism is much faster, which requires more oxygen.As I said in question 1. A, someone who exercises on a regular, intense basis will have a much slower resting heart rate than a normal, average adult. This happens because the heart, as it exercises as well, becomes more efficient with each beat so it has to beat less times to get the same amount of blood around the body. On the other hand, someone who exercises less than average will have a higher resting heart rate because the muscles of the heart aren’t as strong and efficient. The sounds your heart makes (lub-dub) when you listen to your heart beats with a stethoscope are caused by the snapping shut of the mitral and tricuspid valves. One closes a fraction of a second before the other which is why there are two sounds and not just one. When you are holding your breath, these sounds will be slower and farther apart because your heart is beating slower, when you are exercising the sounds will be faster and closer together.A) At Rest: The heartbeat at a resting rate would be slower than if the person was up and about, doing activities. The typical healthy bpm of an adult is between 60 and 80 beats, but if you do regular exercise, it is normal to be significantly lower. For example Lance Armstrong was known to have a resting heart rate around 32 bpm.