Which part of a neuron is a long, tail-like extension that carries messages out to other cells?

When you look directly at an object, the image of the object focuses on a spot where many receptor cells called cones are packed together. This spot, which also gives us our sharpest vision, is the _____

a) retina. b) ganglion. c) fovea. d) blind spot.

Which is the newest of the five basic tastes to be discovered?

a) bitter b) sour c) sweet d) umami or brothy