The body temperature rises when someone has a fever.

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Chapter 21, Problem 10MC

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The body temperature rises when someone has a fever.

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For the following scenarios, state which part of the brain would be affected and give reasons for your choice of answer in each case. a) When the immune system of a person with Tuberculosis is trying to fight off the bacteria, chemicals are produced from particular lymphocytes. These chemicals raise the core body temperature and the core body temperature ‘thermostat’ setting is also changed. State which part of the brain would be affected and explain your answer. b) During exercise the heart rate increases. After exercise, there is a recovery period where the heart rate is returned to normal. State which part of the brain would be damaged if this could not occur and explain your answer.

About fever, it is CORRECT to affirm that: Fever is beneficial because it increases the metabolic activity of immune cells, which can kill microbes faster. Any increase in body temperature is considered fever. Cytokines cause the hypothalamus to release prostaglandins that reset the hypothalamus' thermostat to a higher temperature. LPS is a pyrogen and can induce fever.

Read the situation below and draw a diagram or illustration on how a fever happens. When bacteria are destroyed by leuckocytes, pyrogens are released into the blood. Pyrogens reset the body’s thermostat to a higher temperature, resulting in fever. How might pyrogens cause the body temperature to rise? The hypothalamus maintains the set point for body temperature through reflexes that cause vasodilation and sweating when the body is too warm, or vasoconstriction and shivering when the body is too cold. It responds to chemicals from the body. When a bacterium is destroyed by phagocytic leukocytes, chemicals called endogenous pyrogens are released into the blood. These pyrogens circulate to the hypothalamus and reset the thermostat. This allows the body’s temperature to increase in what is commonly called a fever. An increase in body temperature causes iron to be conserved, which reduces a nutrient needed by bacteria. An increase in body heat also increases the activity of the animal’s…