crayfish - The effect of temperature, hypoxia, and...

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The effect of temperature, hypoxia, and serotonin on the heart of a crayfish Cardiovascular output is directly related to metabolic rate because the heart is responsible for adjusting metabolic output. Cardiovascular output is measured by heart rate and stroke volume. In invertebrates, the heart rate is controlled by neurons. In this lab, the effects of three different environments, warming temperature, hypoxia, and serotonin, are explored. It is expected that there should be a strong correlation between heart rate and both temperature and hypoxic conditions. For the different concentrations of serotonin, an s-shaped curve is expected as well as slight correlation between concentration and strength. In this experiment, the crayfish’s heart was exposed by first placing the crayfish on ice for 10 minutes and then cutting off a portion of the exoskeleton to reveal the heart underneath. Heart rate was recorded by simply watching the heart, counting the number of contractions in 30 seconds and multiplying by two. The same crayfish (N = 1) was used for each trial. First, the heart rate for temperature was collected by placing the crayfish in an ice water bath for 10 minutes.
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crayfish - The effect of temperature, hypoxia, and...

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