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lisabon 2012 [21]
3 years ago
14

How does fever indicate that your body's immune system is doing its job? Fever increases white blood cell production. Fever rais

es the body's temperature to destroy harmful substances. Fever triggers inflammation. Fever causes the secretion of hormones that fight harmful substances.
Biology
2 answers:
Nikolay [14]3 years ago
3 0
<span>Fever raises the body's temperature to destroy harmful substances. Would be correct.</span>
faltersainse [42]3 years ago
3 0

Ans.

Fever shows an elevated body temperature due to increase in temperature set point of body. Fever is a part of immune response as it destroys harmful pathogens or their components by providing unfavorable environment for them. Many pathogenic viruses and bacteria are temperature sensitive and they cannot survive in high temperature.

Thus, the correct answer is 'option). fever raises the body's temperature to destroy harmful substances.'

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In vertebrates, chemical messengers called hormones are secreted by the _____ system. endocrine excretory hormonal pituitary
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The correct answer should be the endocrine system.

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Typically, urea broth is filter-sterilized because autoclaving breaks down the urea. However, even unsterilized broth rarely pro
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Answer:

When organisms use urea, ammonia is generated during incubation, which makes the reaction of these media alkaline

Explanation:

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Suspend 3.87 grams of the medium in 100 ml of distilled water without heating. When the powder dissolves, sterilize by filtration. Dispense quantities of 0.5 to 2 ml in small sterile tubes. Larger volumes may be used but the reactions will be slower. Do not sterilize in autoclave.

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8 0
4 years ago
An enzyme contains a catalytic histidine residue in its active site that must release an R group proton to solution in order to
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Options missing:

a) The pH of the environment should be relatively high.

b) The pH of the environment should be relatively low.

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d) The environment should be set to the biochemical standard state.

Answer:

a) The pH of the environment should be relatively high.

Explanation:

For optimal function an enzyme needs a certain environment or condition. As temperature increases, the rate of enzyme activity also increases. As temperature increases toward its optimum point of 37 degrees Celsius (98.6 F), hydrogen bonds relax and make it easier for the hydrogen peroxide molecules to bind to the catalase.

The part of the enzyme where this reaction takes place is called the active site. A temperature that is higher or lower than this optimum point changes the shape of the active site and stops the enzyme from working. This process is called denaturation.

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General acid catalysis would require histidine to be protonated at pH values (pH 8.0) optimal for enzymatic activity which is relatively high.

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3 years ago
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