The relationship between body temperature and environmental temperature for two animals is plotted below - Leaving Cert Biology - Question 3 - 2013
Question 3
The relationship between body temperature and environmental temperature for two animals is plotted below.
One of these animals is a dog and the other is a lizard.
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Worked Solution & Example Answer:The relationship between body temperature and environmental temperature for two animals is plotted below - Leaving Cert Biology - Question 3 - 2013
Step 1
Which of the plots, X or Y, relates to the dog? Explain your answer.
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Answer
The plot that relates to the dog is plot X. This is because the dog's body temperature remains relatively stable despite changes in environmental temperature, as indicated by the horizontal line in the graph.
Step 2
In relation to body temperature, what term is used to describe animals such as the dog?
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Answer
The term used to describe animals such as the dog is 'endothermic.' This indicates that dogs maintain a stable internal body temperature regardless of external conditions.
Step 3
What is the main source of the dog's body heat?
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Answer
The main source of the dog's body heat is respiration, or metabolism, which is the process through which energy is produced in the body, primarily from carbohydrates or fats.
Step 4
Suggest a value to dogs of the relationship between their body temperature and environmental temperature.
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Answer
The dog's body temperature can be consistent with the environmental temperature, typically around 37.5 to 39.2 °C, representing a stable internal temperature that does not significantly fluctuate.
Step 5
In relation to body temperature, what term is used to describe animals such as the lizard?
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Answer
The term used to describe animals such as the lizard is 'ectothermic.' This means that their body temperature is largely dependent on the environmental temperature.
Step 6
What is the main source of the lizard's body heat?
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Answer
The main source of the lizard's body heat is the environment, including sources such as the sun and the surrounding habitat.
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