Which of the Following Describes the Effect of End- Diastolic

question 45

Multiple Choice

Which of the following describes the effect of end- diastolic volume on stroke volume?

• A)A decrease in end- diastolic volume creates a vacuum drawing more blood into the ventricle increasing stroke volume.
• B)A decrease in end- diastolic volume allows ventricular muscle cells to relax more during diastole, allowing more blood to return to the heart increasing stroke volume.
• C)An increase in end- diastolic volume stretches ventricular muscle cells to lengths closer to optimum, increasing the strength of contraction and thereby increasing stroke volume.
• D)A decrease in end- diastolic volume allows cardiac muscle to relax, conserving energy for the next contraction, thereby increasing stroke volume of that next contraction.
• E)An increase in end- diastolic volume stretches ventricular muscle cells to lengths greater than optimum, decreasing the strength of contraction and thereby decreasing stroke volume.

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Definitions:

Nasal Speculum

A medical tool used to widen the nostrils for examination of the inner nose.

Nose

The part of the human face that contains the nostrils and the organs of smell and forms the beginning of the respiratory tract.

Sterilized

The state of being free from all living microorganisms, achieved through methods such as heat, chemicals, or radiation, to prevent infection.

Vaginal Speculum

A medical tool used to separate the walls of the vagina for examination of the cervix and the vaginal canal.