The axon joins the cell body at a cone-shaped elevation called the?
a) initial segment
b) axon hillock
c) myelin sheath
d) neurolemma
e) axon collateral

B. axon hillock

Explanation:

The axon hillock is the junction where the cyton connects with the axon. There is only one axon hillock in the neuron and it is a triangular depression of cell boy to the axon. The axons receives impulse from cyton carry to the different parts of the body. The axon hillock is also called initial segment. Because action potential starts here.

Myelin sheath is the cover or layer around the axon and helps in saltatory movement of impulse. The propagation of impulse is fast in myelinated neurons than the non-myelinated neurons.

The neurolemma is the neural membrane of the neurons. It is like the plasma membrane of the cell. The outer covering of neurons is called neurilemma.

Axon collateral is the end of the axon where axon terminals arise. They carry impulse and transmit to the synapse.