Describe the events that occur from the time a motor neuron releases acetylcholine at the neuromuscular junction until a muscle until a muscle cell contraction occurs and is ready to fire again

Australopithecus robustus was likely the longest-surviving species of australopithecine in south africa. it had: a. large molars, a big face, and a sagittal crest. b. a large body, large teeth, and a sagittal crest. c. a big brain, big teeth, and a big face. d. a big face, large teeth, and a large body