When a motor neuron forms a synapse to a muscle fiber, (A)________ levels are up regulated by Neuregulin. In addition, (B)_______ binds to its receptor MuSK and (C)_____ mediates the clustering of ACh receptors.

a. (A) NMDA receptor, (B) rapsyn, (C) CamKII
b. (A) NMDA receptor, (B) rapsyn, (C) MuSK
c. (A) ACh receptor, (B) agrin (C) rapsyn
d. (A) ACh receptor, (B) agrin (C) CamKII


Answer: c. (A) ACh receptor, (B) agrin (C) rapsyn

Biology & Microbiology

You might also like to view...

Which group has the largest number of chromosomes?

a. hepatophytes b. gymnosperms c. angiosperms

d. lycophytes e. charophytes

Biology & Microbiology

Which phylum is most closely related

developmentally to the first vertebrates? a. Echinodermata b. Arthropoda c. Mollusca d. Annelida e. none of these

Biology & Microbiology

________ defenses are not permanently present but, rather, are brought about by the presence or action of predators

Fill in the blank(s) with correct word

Biology & Microbiology

The phospholipids that make up the plasma membrane have ________ heads and ________ tails

A) hydrophobic; hydrophilic B) prokaryotic; eukaryotic C) eukaryotic; prokaryotic D) cytoplasmic; phagocytic E) hydrophilic; hydrophobic

Biology & Microbiology