outer layer of cells in the blastocyst

acts to block myosin binding sites on actin molecules, preventing cross-bridge formation and preventing contraction until a muscle receives a neuron signal

binds to tropomyosin and helps to position it on the actin molecule, and also binds calcium ions

series of genes necessary to synthesize tryptophan in prokaryotic cells

pancreatic protease that breaks down protein

amino acid that can be synthesized by prokaryotic cells when necessary

modified underground stem adapted for starch storage; has many adventitious buds

reclamation of water and solutes that got filtered out in the glomerulus

process of secretion of wastes that do not get reabsorbed

sessile chordate that is a member of Urochordata

(also, tympanic membrane or ear drum) thin diaphragm between the outer and middle ears