Multiple choice general knowledge science & technology What is the expansion of H & N in H1N1 & what is H5N1? Hypothalamus, Neurotransmitters, swine flu Hypothalamus, Neurotransmitters, avian flu Haemagluttenin, Neuraminidase, avian flu Haemagluttenin, Neuraminidase, normal flu Reveal answer Fill a bubble to check yourself C Correct answer Explanation H and N stand for Haemagglutinin and Neuraminidase, which are surface proteins on influenza viruses. H5N1 causes avian flu in birds, not normal flu. The hypothalamus/neurotransmitter options are biologically incorrect.