Researchers Have Found That

Multiple Choice

Researchers have found that:

A) in myelinated axons,the action potential at each point in the axon gives rise to a new action potential at the next point.
B) in unmyelinated axons,positively charged ions flow down the axon at a very fast rate,causing regeneration of the action potential at each node.
C) throughout life,unused synaptic connections are pruned away as cells or their branches die and are not replaced.
D) when a nerve impulse reaches the axon terminal's button-like tip,the action potential "hops" over to the receiving neuron's dendrites.