describe the functions of ciliated epithelial cells, goblet cells and mucous glands in maintaining the health of the gas exchange system

explain the relationship between genes, proteins and phenotype with respect to the: • TYR gene, tyrosinase and albinism • HBB gene, haemoglobin and sickle cell anaemia • F8 gene, factor VIII and haemophilia • HTT gene, huntingtin and Huntington’s disease