NEURON ANATOMY. NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron.

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Presentation transcript:

NEURON ANATOMY

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron.

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell.

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell. Axon: Cell process that carries electric signals away from the cell body. Up to 3-4 ft. long.

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell. Axon: Cell process that carries electric signals away from the cell body. Up to 3-4 ft. long. Schwann cells: made of fat, wrap around axon to form myelin insulation. Increases the speed of nerve conduction, like insulation.

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell. Axon: Cell process that carries electric signals away from the cell body. Up to 3-4 ft. long. Schwann cells: made of fat, wrap around axon to form myelin insulation. Increases the speed of nerve conduction, like insulation. Nodes of Ranvier: (gaps between Schwann cells) Electrical signals jump from gap to gap, speeding conduction.

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell. Axon: Cell process that carries electric signals away from the cell body. Up to 3-4 ft. long. Schwann cells: made of fat, wrap around axon to form myelin insulation. Increases the speed of nerve conduction, like insulation. Nodes of Ranvier: (gaps between Schwann cells) Electrical signals jump from gap to gap, speeding conduction. Myelin sheath

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell. Axon: Cell process that carries electric signals away from the cell body. Up to 3-4 ft. long. Schwann cells: made of fat, wrap around axon to form myelin insulation. Increases the speed of nerve conduction, like insulation. Nodes of Ranvier: (gaps between Schwann cells) Electrical signals jump from gap to gap, speeding conduction. Myelin sheath Axon terminals: hundreds of thousands

NEURON Dendrites: (dend = tree) cell processes that carry electric impulses from an incoming nerve to a cell body. Hundreds per neuron. Cell body: Contains nucleus, cytoplasm, and organelles. Metabolic center of a cell. Axon: Cell process that carries electric signals away from the cell body. Up to 3-4 ft. long. Schwann cells: made of fat, wrap around axon to form myelin insulation. Increases the speed of nerve conduction, like insulation. Nodes of Ranvier: (gaps between Schwann cells) Electrical signals jump from gap to gap, speeding conduction. Myelin sheath Axon terminals: hundreds of thousands Synaptic bulb: contain neurotransmitter released with impulse