The Nervous System

Neuron: gather signals & convert them into electrical signals called impulses

• Dendrites

• Myelin Sheath

• Axons

• Soma

• Synapse

Neuron: a type of insulation that helps impulses move faster

• Dendrites

• Myelin Sheath

• Axons

• Soma

• Synapse

Neuron: carries nerve impulses to other neurons or other types of cells

• Dendrites

• Myelin Sheath

• Axons

• Soma

• Synapse

Neuron: a junction between neurons

• Dendrites

• Myelin Sheath

• Axons

• Soma

• Synapse

Neuron: contains the nucleus & the cell organelles

• Dendrites

• Myelin Sheath

• Axons

• Soma

• Synapse

Carry impulses from the external environment to the central nervous system

• Sensory neurons

• Interneurons

• Motor neurons

Found in skin, muscles & organs

• Sensory neurons

• Interneurons

• Motor neurons

Located in spinal cord & brain

• Sensory neurons

• Interneurons

• Motor neurons

Carry impulses from central nervous system to an effector organ, such as muscle or gland

• Sensory neurons

• Interneurons

• Motor neurons

When we touch hot objects, we immediately move our hand away.

• Spinal reflex

• Brain reflex