which can be comp funs in ra credit assignnent turn in this Estra copies of this
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which can be comp funs in ra credit assignnent turn in this Estra copies of this quiz are available under assign Multiple Choice: quiz at the start of lecture week 4lecture test 1. No eile Questions 1-20: b. an oxygen pressure gradient d. all of these are equally important Which of the following is always noeded to cause blood to flow? a bloedotie pressure gradient blood pressure gradient 2, Which of the following equations is NOT comect? a. cardiac output stroke volume multiplied by the beart raie b. stroke volume heart rate divided by cardiac output e -cardiac output divided by stroke volume used to describe the amount of blood moved into the systemic circuit each minute? e.reload 3, Which term is to a. stroke volume cardiac output d. afterload e. cardiac reserve 4 What would happen to cardiac output if the stroke volume increased, and the heart rate stayed the same? output a c. cardiac output would increase a cardiac output would . What would happen to cardiac b. cardiac output would decrease heart rate hot be affected ppen to cardiac output if the heart rate decreased, and the stroke volume stayed the same? diac output would not be affected b. cardiac output would decreasec 6. Two people have the mL/beat. volume of 80 same cardiac output. The first has a heart rate of 60 beats/min and a stroke output. The The output and heart rate of the second person asgond has a stroke volume of only 30 mL/beat, due to severe internal bleeding. What is the a. 1,800 mL/min and 240 beats/min c. 4,800 mI/min and 160 beats/min b. 2,400 ml/min and 180 beats/min d. none of the previous choices are correct 7. When the ventricles are ful ly contracted (mid-systole) what happens to the heart valves? and semilunar valves are closed b. both atrioventricula r and semilunar valves are open d. atrioventricular valves are closed and semilunar valves are open r valves are open and semilunar valves are closed 8. ing veniricular systoltheesure in theIet ata s ower tthe pressure in the lef ricle 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 the ventricle to the atria and cardiac output would decrease c. blood would flow from the atria to the ventricles and cardiac output would ncrease d. blood would flow from the ventricle to the atria and cardiac output would increase Stroke volume would be expected to decrease if 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 cach cardiac cycle? a. 1.33 seconds b. 0.75 seconds c. 4.8 seconds d. none of the previous choicesExplanation / Answer
Qno1 ans ( c part is correct answer)
Blood pressure gradients is ultimately responsible for blood to flow it within vasculture it is normally less than 10 mm Hg.
2 . ( b part is wrong equation)
Stroke volume is volume of blood flow ( cardiac output) divided by heart rate.
3. ans ( b part is correct ans)
Cardiac output is the amount of blood flow from ventricles into systamatic circuit per minute.
4. ( c part )
Cardiac output is directly proportional to stroke volume and heart rate so if stroke volume decreased cardiac output will also decrease to maintain constancy.
5. ( b part )
In this case another directed proportion stroke volume decreased so cardiac output will also decrease
6 ( c part)
Let c1 cardiac output of ist person and c2 cardiac output of 2nd person
C1 = stroke v × heart rate
= 60×80 = 4800ml /beta
C2 = stroke v × heart rate
But c1 = c2 = 4800
4800= 30× heart rate
=> heart rate = 160 beat/mint
7. ( d part )
When ventricles contract aurioventricles closed so that blood does not go into auricles and semilunar valves open so that blood goes into arteries
8. ( b part)
When auriclesventricular valve remain open blood will flow from ventricles to auricles and it will decrease cardiac output.
9. ( c part)
Stroke volume decreases if pressure in aorta is higher resist blood to enter into artists results decrease in stroke vol.
10. ( b part)
Cardiac cycle is how many times heart beats in a second
= 60/ 80 = 0.75 second take one beat
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