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Na+ ions are actively transported out of the epithelial cell into the blood by an Na+ pump. This requires ATP. This establishes a concentration gradient of Na+, with a high Na+ concentration in the ileum ...
The alveoli are arranged in clusters at the end of the bronchioles in the lungs. The lungs contain an extremely large surface area of alveoli (around 70m2) which acts to provide the maximum space for the ...
These pumps use ATP / active transport to move 3 sodium ions (Na+) out of the cell for every two potassium ions (K+) that move in.1 mark - idea of active transport / use of ATP1 mark...
DNA helicase unwinds the DNA double strand / causing hydrogen bonds between complimentary base pairs to break / both single strands used as templates / DNA replication is semi conservative and semi discon...
Every individual of every species living on the planet has DNA, made up of sections called genes. Mutations to these genes occur over time, resulting in a change to an individual's behaviour or physiology...
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