1) The body system involving receptors, neurones and effectors. a) The skeletal system b) The reproductive system c) The nervous system d) The respiratory system e) The digestive system 2) Chemical messengers transported in the blood a) Urea b) Hormones c) Electrical impulses d) Amino acids 3) The body system responsible for releasing hormones a) The nervous system b) The endocrine system c) The respiratory system d) The digestive system 4) The blood vessels which allow for exchange of materials between blood and cells a) Arteries b) Veins c) Capillaries 5) Starch is a polymer made of a) Glucose b) Amino acids c) Fatty acids d) Glycogen e) Glycerol 6) Diabetes is a condition affecting regulation of a) Blood water levels b) Body temperature c) Blood urea concentration d) Blood glucose concentration 7) Excess amino acids are broken down into a) Carbon dioxide b) Water c) Urea d) Salts 8) Enzymes are a) Carbohydrates b) Lipids c) Nucleic acids d) Proteins

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