Question

Trace the direction of flow of electrical activity through a neuron, starting with the arrival of a signal at a dendrite_________

Answer 1

Dendrite, cell body, axon hillock, axon, axon terminal, synaptic knob.

Step-by-step explanation:

Neurons may be defined as the functional and the structural unit of the nervous system. The neurons helps in the transduction of the nerve impulse from the sensory receptor to the effector organs.

The sensory receptors are received by the dendrites. Then the information is passed down to the axon from the cell body via the axon hillock. At the end of the axon terminal the synaptic knob is present. This synpatic knob results in the secretion of the chemicals to transfer the messages.

Thus, the answer is dendrite, cell body, axon hillock, axon, axon terminal, synaptic knob.

Answer 2

Dendrite, cell body, axon hillock, axon, axon terminal, synaptic knob

Step-by-step explanation:

The structure of neuron consists of a cell body, plasma membrane extensions called dendrites and axon terminal, the cell body containing axon hillock where the nerve impulse is generated and the synaptic knob at the end of the axon terminal.

The dendrites receive the impulse or detect the stimulus which cause gets transferred to the cell body containing the nucleus from where the nerve impulse is generated in the axon hillock by the movement of the sodium and potassium ions which generates action potential.

The impulse move from the axon hillock to long cylindrical structure called axon and reaches the axon terminal. The impulse is then transferred to the synaptic knob then.

Thus, Dendrite, cell body, axon hillock, axon, axon terminal, synaptic knob is the correct answer.