Why does shivering occur when the body is cold, and how does it affect temperature?
Why does shivering occur when the body is cold, and how does it affect temperature?
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Questions and Answers For
AQA GCSE Biology
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What is vasoconstriction, and how does it help to raise body temperature?
What is vasoconstriction, and how does it help to raise body temperature?
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What mechanisms are triggered when body temperature is too low?
What mechanisms are triggered when body temperature is too low?
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How does sweat production affect body temperature?
How does sweat production affect body temperature?
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What is vasodilation, and how does it contribute to cooling the body?
What is vasodilation, and how does it contribute to cooling the body?
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What processes occur when body temperature is too high, and how do they help to reduce temperature?
What processes occur when body temperature is too high, and how do they help to reduce temperature?
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What is the function of temperature receptors in the skin, and how do they communicate with the thermoregulatory center?
What is the function of temperature receptors in the skin, and how do they communicate with the thermoregulatory center?
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How do receptors in the thermoregulatory center respond to changes in blood temperature?
How do receptors in the thermoregulatory center respond to changes in blood temperature?
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What role does the thermoregulatory center in the brain play in temperature regulation?
What role does the thermoregulatory center in the brain play in temperature regulation?
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How is body temperature monitored and controlled in the body?
How is body temperature monitored and controlled in the body?
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Top Questions
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Discuss the advantages and disadvantages of genetically modifying crops, including soya, maize and rice
Sourav
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Outline the process of genetic modification using bacterial production of a human protein as an example, limited to: (a) isolation of the DNA making up a human gene using restriction enzymes, forming sticky ends (b) cutting of bacterial plasmid DNA with the same restriction enzymes, forming complementary sticky ends (c) insertion of human DNA into bacterial plasmid DNA using DNA ligase to form a recombinant plasmid (d) insertion of recombinant plasmids into bacteria (specific details are not required) (e) multiplication of bacteria containing recombinant plasmids (f) expression in bacteria of the human gene to make the human protein
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Outline examples of genetic modification: (a) the insertion of human genes into bacteria to produce human proteins (b) the insertion of genes into crop plants to confer resistance to herbicides (c) the insertion of genes into crop plants to confer resistance to insect pests (d) the insertion of genes into crop plants to improve nutritional qualities
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Describe genetic modification as changing the genetic material of an organism by removing, changing or inserting individual genes
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Describe and explain the conditions that need to be controlled in a fermenter, including: temperature, pH, oxygen, nutrient supply and waste products
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Describe how fermenters can be used for the large-scale production of useful products by bacteria and fungi, including insulin, penicillin and mycoprotein
