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Centaurus/Scott

CHS/Scott Cardiac Unit

QuestionAnswer
What does 'VO2 Max' mean? Do you remember your VO2 max? The maximum amount of oxygen your body can use. It tells you how efficient your system is.
What measurements do you need to calculate your VO2 Max? (Think of our lab on the track.) You need these measurements to calculate it: mile time, heart rate after the mile, height, weight, age, and gender. (you can go to www.brianmac.co.uk/rockport.htm to calculate this).
What does 'pulse' mean, and what is a normal resting pulse? The number of times your heart beats in a minute. A normal one is between 50-75 beats per minute.
(QOD) What does 'vital capacity' mean? (think of the balloon lab). How do we calculate it? The amount of air that a person can inhale or exhale. You can calculate this by blowing all of your air into a balloon and finding the volume of that balloon.
In any biology textbook, the Right side of the heart will be on what side of the page?! The left side! Heart diagrams are always positioned as if you were looking down on the body. So the right side of the heart is on the left of the page.
(QOD) Why does the heart have four chambers? The heart has this many chambers so it can: 1. Separate oxygenated and deoxygenated blood. 2. Create more pressure in the heart pump. More pressure allows the heart to pump blood out faster and more efficiently.
What do the variables mean in this equation: CO= P * SV? (remember the lab worksheet) The equation for Cardiac Output. CO= Cardiac output (the volume of blood pumped out of the heart every minute). P= Pulse (number of beats per minute). SV= Stroke volume (the volume of blood pumped out of the heart during each beat).
If you take your pulse for 10 seconds and count 13 beats, how do you find your beats per minute? (and what is that number?) (How many 10s are in 60?) 6. So multiply 13*6=78. Because you counted for 10 seconds and there are 60 seconds in a minute, you have to multiply by 6.
Jane is at the doctor. A nurse takes her pulse, and counts 20 beats in 15 seconds. What is Jane's real pulse (beats per minute?). Is it in the normal range? (How many 15's are in 60?) 4. So 20*4=80 (you must multiply by 4 because 15 seconds * 4 = 1 minute). The normal range is 50-75. Jane's pulse if a little high.
Use this equation: CO=P*SV. John's Pulse is 84 beats/min and his Stroke Volume is 90 mL/beat. What is his Cardiac Output? (Don't forget units!) Since CO=P*SV, CO=84 beats/min * 90ml/beat. CO= 7560 mL/min. (the 'beats' cancel out!)
In a heart diagram, what does the red blood mean? Also, which direction is it going (to or from the heart?) This color of blood is oxygenated. It is traveling away FROM the heart to feed the body.
In a heart diagram, what does the blue blood mean? Also, which direction is it going (to or from the heart?) This color of blood is deoxygenated. It is traveling TO the heart to get oxygen.
Name the two veins that bring blood INTO the heart. The Vena Cava (both superior and inverior), and the Pulmonary Veins take blood in this direction.
Name the two arteries that take blood OUT of the heart. The Aorta and the Pulmonary Artery take blood in this direction.
What is an artery? (What does it do?) These carry blood away from the heart and bring oxygen to the rest of the body.
What is a vein? (what does it do?) These carry blood from the body to the heart.
What is a capillary? These have very thin walls. They allow both oxygen and waste to diffuse into and out of cells in the body.
Created by: ksirridge
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