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Questions and Answers
What is preload?
What is preload?
- The volume of blood in the ventricles at the end of diastole
- The amount of blood ejected from the ventricles per beat
- The amount of blood coming into the heart from superior and inferior vena cava (correct)
- The volume of blood in the ventricles at the end of systole
What is the effect of an increase in preload on ventricular contraction?
What is the effect of an increase in preload on ventricular contraction?
- Increases the strength of ventricular contraction (correct)
- Increases the heart rate
- Has no effect on ventricular contraction
- Decreases the strength of ventricular contraction
What is the relationship between preload and tension developed in the muscle?
What is the relationship between preload and tension developed in the muscle?
- Preload decreases the tension developed in the muscle
- Preload increases the tension developed in the muscle (correct)
- Preload has no effect on tension developed in the muscle
- Preload alters the heart rate
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