26-30 Base your answers for questions 26-30 on the chart below Pluid In Fluid Ou

Question

26-30 Base your answers for questions 26-30 on the chart below Pluid In Fluid Out SV x HR Diameter of Diame Arterioles Veins Kidneys 26 This letter represents The Cardiac Output 27, This letter represents Resistance of the System to Blood Flow 28 This letter represents The Blood Volume 29 This letter represents Mean Arterial Pressure . 30 This letter represents Relative Distribution of Blood 31 Each of the following factors will increase cardiac output, except a. increased venous return b. increased parasympathetic stimulation c. increased sympathetic stimulation d. increased heart rate e. both b and d According to Starling's 'law of the heart', the cardiac output is directly related to the a. Output of the atria b. heart rate c. end-diastolic volume d. thickness of the myocardium e. end-systolic volume 32 33 The blood vessels that play the Most important role in the regulation of blood flow to a tissue and blood pressure are the a. arteries b. arterioles c. veins d. venules e. capillaries

Explanation / Answer

26.cardiac output represented by B

27resistanc of system to blood flow-diameter of artery (C)

28.blood volmue(D) .diameter of vein

29.mean arterial pressure (A ) fluid out and kidney

30.relatuve distributiom of blood -(A) fluid in.

31.venous return increas cardiac output because co=sv ×hr

Sv -stroke volume hr=heart rate,increase venous return increase stroke volume

Heart rate decreas cardiac output.

Sympathetic stimulation increase force of contaction thus increas cardiac output.

Parasympathetic stimulation decrease cardiac output thus decrease cardiac output.

32.according to frank starling law preload os directly propertional to end diastolic volume i,e amount of blood remaining in the ventricle at the end of diastole.

So the correct ans.is option(C )

33.arteriole -most imp.role regulation of blood flow to tiasue and blood pressire.this is the main site of peripheral resistance..blood flow to differant organ can be so effectively regulated by small changes in caliber of the arteriole

Artery are distensible vessels .

Capillaries are the exchange vessel allow easy exchange of gases and nutritive substance across them

Vein are the capacitance vessel change in their luminal shape canaccomodate large volume if blood

So ans option(B)

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