When conducting an experiment, variables must be identified. Controlled variable: Breakfast time, 7:30 am. Constants: Nomal Glucose level before breakfast. Glucose level when Failing feedback mechanism. Chamical X effect. Trends on the explanation.
Let us first review some concepts,
What are the independent, dependent, and controlled variables?
- Independent variables are those modified or changed by the researcher to study how this change affects another variable and hence the results.
This variable is not affected by any other one but influences or causes a reaction in other variables.
- The dependent variable is the one influenced by the independent variable, and is affected by any change on this last one.
Its response might be either directly proportional or inversely proportional to the change in the independent variable.
- The controlled variables all the other variables that are kept constant in the control groups and the experimental groups.
Unlike the independent variable, the controlled variables do not influence the results.
These variables do not affect the response of the dependent variable.
In conclusion, the independent variable changes and influences the dependent variable, which depends on the first one. Controlled variables are all the remaining variables that are kept constant.
In the exposed example, you want to test the effect of time on blood glucose levels.
Here, the influencing variable is time, and the affected variable is glucose level, so
- Independent variable: Time
- Dependent variable: Blood glucose level
Usually, when making a graph, the X ax represents the independent variable while the Y ax represents the dependent variable.
Note: You can use this information to check your answers in questions 10, 11, 14.
Individuals 1 and 2 can be considered the experimental groups.
Controlled variable: Breakfast time, 7:30 am
The three constants could be for instance,
- Glucose level before breakfast ⇒ 80-90 mg/100mL blood
- Failure in feedback mechanism ⇒ above 110 mg/100mL blood
- Chamical X effect
Trend statement
Individual 1 showed an increase in glucose level from 7:00 to 8:00 am, reaching a maximum point of 140mg/100mL. After 8 am glucose levels slowly decreased to 90 mg/100mL at 9:00 am. From 9:00 to 11:00. glucose levels remained relatively constant, between 85-90 mg/100mL.
Individual 2 showed an increase in glucose level from 7:00 to 8:30 am, reaching a maximum point of 250mg/100mL. After 8:30 am glucose levels slowly decreased to 170 mg/100mL at 11:00 am.
Individual 2 expressed significantly higher levels of blood glucose compared to individual 1.
Individual 1 showed normal glucose levels in the blood, beginning with 90 mg/100 mL at 7:00 am before breakfast, and ending with 90 ml/100 mL at 11:00 am.
Individual 2 showed a high level of glucose at 7:00 am before breakfast (150mg/100mL), and at 11:00 am (170 mg/100mL), reflecting failure in the feedback mechanism.
In the attached files you will find a graph representing data during the experiment.
You can learn more about variables at
brainly.com/question/25978118
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