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Would stroke volume increase or decrease if your unhealthy?

Stroke volume can decrease if you are unhealthy. Health conditions such as heart failure, heart disease, or dehydration can negatively affect the heart's ability to pump blood effectively, leading to a decrease in stroke volume.


Would an increase in contractility cause an increase to cardiac output?

Yes - an increase in contractility would lead to an increase in stroke volume. An increased stroke volume would cause an increased cardiac output.


How would a decrease in blood volume affect both stroke volume and cardiac output?

It's decreased ... unless the rate falls, which is the normal cardiac response.


If you squeezed a balloon and made it smaller would the density in the air would become greater?

Yes. When you squeeze the balloon, you cause the volume to decrease. Since density is determined by dividing mass by volume, a decrease in volume will cause an increase in denisty.


Which of the following would cause the greatest increase in cardiac output?

Increased heart rate and increased stroke volume


How does crank angle effect volume of cylinder?

The crank angle would change the stroke. The stroke would change the volume.


What is happening to the substances mass and volume to cause this decrease in density?

As the mass of a substance increases while its volume stays constant, its density will also increase. Conversely, if the mass of the substance stays constant while its volume increases, the density will decrease. This is because density is directly proportional to mass and inversely proportional to volume.


When a substance changes from a solid to a liquid its density normally decreases. What is happening to the substance's mass and volume to cause this decrease in density?

A decrease in density would indicate a reduction in mass relative to the volume. If the mass decreases but the volume remains the same or increases, then the density would decrease.


What would happen if blood started flowing backward through a valve?

If blood starts flowing backwards through a valve, stroke volume and ejection fraction would decrease. The heart's pumping action would be less efficient.


Explain why severe vomiting and diarrhea would cause a decrease in the blood volume?

because it causes dehydration therefore there loss of water in the blood plasma


Why would an increase in stroke volume lead to a drop in resting heart rate?

I may be guessing here but I am thinking with an increase in stroke volume you body is getting more volume per beat ... therefore it compensates by lowering the heart rate. if your pump is more efficient then you body doesn't need your heart to pump as often. That's the only rationale i can think would cause it!


What change to a wire would cause its resistance to decrease?

Decreasing the length or increasing the thickness of the wire would cause its resistance to decrease.