2. Neuron Structure

Two main nervous tissue cell types?

Neurons and neuroglia

Neurons are excitable meaning?

Respond to a stimulus by generating an AP

Three parts of most neurons?

Cell body, dendrites, axon

Cell body (soma)?

Nucleus, organelles

metabolic and biosynthetic center

Dendrites?

Short, branched

receive input and send impulses toward the cell body

Axon (nerve fiber)?

Usually single and long

generates and conducts APs

Axon hillock?

Part of cell body where the axon arises

Telodendria?

Small axon branches ending in axon terminals

Axon terminals (synaptic bulbs)?

Form synapses; release neurotransmitters

Receptive region?

Dendrites and cell body; receive signals

Conducting region?

Axon; conducts APs away from cell body

Secretory region?

Axon terminal

releases neurotransmitters

Nervous tissue ECM?

Few protein fibers; mostly ground substance