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Detail some of the physiological responses that occur to increase body temperature (6)

Blood vessels near the surface of the skin constrict to prevent heat loss to the environment and maintain blood flow around the central organs. This is called vasoconstriction. Also, skeletal muscles contrac...
EF
Answered by Emily F. • Biology tutor
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How are mitochondria adapted for their function?

Mitochondria have a double membrane structure, with an inner layer with many folds to create a high surface area. This provides more space for more metabolising proteins and therefor they are able to create ...
EJ
Answered by Emilie J. • Biology tutor
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Describe the process of inhalation (inspiration).

Inhale. Internal intercostal muscles relax. External intercostal muscles contract. Ribcage moves up and out. Diaphragm contracts and flattens. Volume in lungs increases. Pressure in lungs decreases. Air move...
AP
Answered by Anya P. • Biology tutor
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Describe how selective breeding could be used to improve the quality of milk produced by cows (4 marks)

Farmers could keep information on their cows such as the milk yield of a bull's mother and daughters in order to select ideal bulls as male parents. These bulls would then be allowed to mate with (unrelated)...
AT
Answered by Adam T. • Biology tutor
12402 Views

Describe how water moves from the soil into a root hair cell

Higher concentration of water outside the cell/lower concentration of solutes outside. Water moves into the cell, down a concentration gradient and through a selectively permeable membrane via osmosis
JT
Answered by Jess T. • Biology tutor
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