Biology Heart Rate Lab. What are the effects of decreasing the amount of water intake on human heart rate?

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Design

Question

What are the effects of decreasing the amount of water intake on human heart rate?

Hypothesis

If the amount of water intake in decreased, heart rate would speed up because the volume of blood is lowered and the heart needs to work harder and faster to pump the blood to the rest of the body.

Materials:

A test subject

Timer

Water

Measuring Cups

Variables

Independent- Amount of water consumed

Dependent- Heart Rate (beats per minute)

Control - 2000mL of water consumption, temperature of environment, 3 minute duration of measuring heart beats.

Protocol Diagram

Procedure

One human test subject was found to conduct this experiment. Instructions were clearly given to the test subject to drink only the prescribe amount of water each day and to consume no other liquids. Instructions also included limiting liquids in her diet. The subject was asked to drink 2000mL of water in 500mL intervals every 2 hours on the first day. She was asked to drink 1500mL of water in 500 mL intervals every 2 hours on the second day. 1000mL in 500mL intervals every 2