A neuron cell body reaches threshold and depolarizes. The depolarization propagates down the length of the ____, is chemically transmitted across the ____, and directly affects the electrical potential in the ____ of the successive neuron.
a. axon; synapse; dendrites
b. dendrites; synapse; axon
c. myelin; synapse; dendrites
d. dendrites; receptor; axon
Question 2
Ivan has discovered how to tame neurons and keep them as pets. When he's bored, he sometimes starts an action potential going down the axon of each of his four pet neurons, just to see which one will win by releasing neurotransmitters first. All of his neurons have axons of the exact same length. Ivan's game got old fast, though, because one neuron always wins. The winner is always ____.
a. Sue, the neuron with the most dendrites
b. Harry, the neuron with the fattest axon
c. Elspeth, the neuron with the largest axon hillock
d. Johann, the neuron with the most potassium channels
A New Heart Cell
(A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph
The major veins of the body.
Naive B Cell
Dermatomes of body, posterior view
Cell Division in Frog Embryos