When sodium ions flow into a neuron and depolarize it, we say the neuron has ______

The complete set of genes that makes up a person's heredity is called

a. an allele. c. a genotype. b. deoxyribonucleic acid. d. a phenotype.

The countries with the highest obesity rates are ____________________

a. the wealthiest countries b. the poorest countries c. Asian countries d. traditional cultures