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The stimulus/heat is detected by receptors in the hand It sends an impulse via sensory neurones to the spinal cord/CNSChemicals are transmitted via the synapses and diffuses across the gap The impulses tr...
The left atrium receives oxygenated blood from the lungs via the pulmonary vein (the only vein to pump oxygenated blood) and ejects via the left ventricle to the aorta.Left sided heart failure means that ...
Food is masticated and broken down, to increase its surface area, in the mouth. Particularly, starch is broken down by the enzyme amylase. An enzyme is a biological catalyst that has an active site and is...
Homeostasis is maintaing the body's internal environment. Antidiuretic Hormone (ADH) is synthesised in the hypothalamus and secreted by the pituitary gland in response to low water in the body. It acts on...
DNA and RNA are both essential components of cells, and thus life. The structure of DNA is similar to that of RNA in that these are both made of nucleotides, which in turn are made of the same basic units...
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