Question 80 Exercise training improves capillary density in muscles True False Q

Question

Question 80

Exercise training improves capillary density in muscles

True

False

Question 81

Which of the following factors will not increase stroke volume?

A.

Increased end-diastolic volume

B.

decreased plasma volume

C.

Increased contractility

D.

Increased preload

E.

Increased venous return

Question 82

A tightly adherent pericardium would principally result in

A.

Impaired systolic ejection

B.

Impaired diastolic filling

C.

High blood pressure

D.

None of the above

Question 83

In a normal person with no cardiac pathology -

LV EDV = 170ml

LV ESV = 80ml

HR = 60 bpm

What is right ventricular cardiac output?

5.4 liters

90ml

cannot compute since RV volumes are unknown.

A.

Increased end-diastolic volume

B.

decreased plasma volume

C.

Increased contractility

D.

Increased preload

E.

Increased venous return

Explanation / Answer

Question 80

True.

Studies have shown increased capillary density in both men and women after a prolonged exercise program. Capillary density is the amount of capillaries present in any party of the body at a time and increased capillary density allows for greater oxygen transport to the muscles which improves the ability to perform intense exercise, so as a feedback mechanism by the body, continued exercise will lead to increased capillary density in the muscles especially.

Question 81

decreased plasma volume

All the other factors are associated with an increased stroke volume.

Question 82:

Impaired diastolic filling

Question 83

CO = HR X SV HR = 60

SV = EDV - ESV = 170-80 = 90

CO = 90 X 60 = 5400 ml = 5.4 liters

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