2. A blood clot reduces blood flow to a person's foot. a) Which circulatory system (pulmonary OR systemic) is affected? Explain. [2 marks]
b) What might eventually happen to the person's foot? Explain why. [2 marks]
3. Write a brief description of what is happening at 1 and 4. [2 marks]

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1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics

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c. heat from the poles back down towards the equator.