Gannon This is an extra credit assignment which can be completed at home and use
ID: 147003 • Letter: G
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Gannon This is an extra credit assignment which can be completed at home and used as a supplemental study guide. You must furn in this quiz at the start of lecture week 4lecture test 1. No extensions/late submissions will be granted. Extra copies of this quiz are available under assignments in blackboard. BIO 24 Cardiovascular Take Home Quiz. Questions 1-20 Multiple Choice: Which of the following is always needed to cause blood to flow? a. an osmotic pressure gradient c. a blood pressure gradient b. an oxygen pressure gradient d. all of these are equally important Which of the following equations is NOT correct? a. cardiac output stroke volume multiplied by the heart rate b. stroke volume- heart rate divided by cardiac output c. heart rate cardiac output divided by stroke volume 3. Which term is used to describe the amount of blood moved into the systemic circuit each minute? stroke volume b. cardiac output d. afterloade.reload c. cardiac reserve would happen to cardiac output if the stroke volume increased, and the heart rate stayed the same? a. cardiac output would not be affected b. cardiac output would decrease e. cardiac output would increase 5. What would happen to cardiac output if the heart rate decreased, and the stroke volume stayed the same? a. cardiac output would not be affected b. cardiac output would decrease c.cardiac output would increase 6. Two people have the same cardiac output. The first has a heart rate of 60 beats/min and a stroke volume of 80 cardiac mi/beat. The second has a stroke volume of only 30 mL/beat, duc to severe internal bleeding. What is the cardiac output and heart rate of the second person? a. 1,800 mL/min and 240 beats/min b. 2,400 ml/min and 180 beats/min d. none of the previous choices are correct c. 4,800 mL/min and 160 beats/min 7. When the ventricles are fully contracted (mid-systole) what happens to the heart valves? a. both atrioventricular and semilunar valves are closed b. both atrioventricular and semilunar valves are open c. atrioventricular valves are open and semilunar valves are closed d. atrioventricular valves are closed and semilunar valves are open 8. During ventricular systole, if the pressure in the left atria is lower than the pressure in the left ventricle AND the left atrioventricular valve is open (does not close properly) what would happen? a. blood would flow from the atria to the ventricles and cardiac output would decrease b. blood would flow from the ventriele to the atria and cardiac output would decrease c. blood would flow from the atria to the ventricles and cardiac output would increase d. blood would flow from the ventricle to the atria and cardiac output would increase a. the amount of blood in the ventricle at the beginning of ventricular systole increases b. the amount of blood in the atria after atrioventicular valves have closed decreases c. the pressure in the aorta is higher than the pressure in the left ventricle d. all of the above are correct If the heart rate is 80 beats per minute how long is each cardiac cycle? a. 1.33 seconds 0. b. 0.75 seconds c. 4.8 seconds d. none of the previous choicesExplanation / Answer
1. Blood pressure gradient
2. Stroke volume = heart rate divided by cardiac output (this statement is incorrect)
3. Cardiac output
4. Cardiac output will increase
5. Cardiac output will decrease
6. 4800 ml/min and 160 beats/min
7. Atrioventricular valves are closed and semilunar valves are open
8. Blood would flow from ventricle to atria and cardiac output will decrease.
9. The pressure in aorta is higher than pressure in left ventricle
10. 0.75 second
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