Biology 30 nervous and endocrine systems

The CNS...

• consists of mechanical and chemical coordination, the brain and the spinal cord

• relays information between the CNS and the rest of the body

The PNS...

• consists of mechanical and chemical coordination, the brain and the spinal cord

• relays information between the CNS and the rest of the body

Axon

• long branches that relay information to terminal ends

• short, thread like branches that collect information

• naked sections of the axon branches between individual Schwann cells

• formed by glial wrapping around axons, increase transmission speeds

dendrites

• long branches that relay information to terminal ends

• short, thread like branches that collect information

• naked sections of the axon branches between individual Schwann cells

• formed by glial wrapping around axons, increase transmission speeds

myelin sheath

• long branches that relay information to terminal ends

• short, thread like branches that collect information

• naked sections of the axon branches between individual Schwann cells

• formed by glial wrapping around axons, increase transmission speeds

nodes of ranvier

• long branches that relay information to terminal ends

• short, thread like branches that collect information

• naked sections of the axon branches between individual Schwann cells

• formed by glial wrapping around axons, increase transmission speeds

myelinated nerve cells...

• make up peripheral nervous system

• make up white matter of CNS

• repair damage

• cannot repair damage

• make up grey matter of CNS

unmyelinated nerve cells...

• make up peripheral nervous system

• make up white matter of CNS

• repair damage to themselves

• cannot repair damage to themselves

• make up grey matter of CNS

sensory neurons

• run from various receptors in the CNS, the ganglia near the spinal cord are formed by neuron's

• found in the brain and spinal cord, stimulated by sensory neurons (integrate and interpret sensory information)

• transmit impulses from the CNS to the muscles or glands (response to stimulus)

motor neurons

• run from various receptors in the CNS, the ganglia near the spinal cord are formed by neuron's

• found in the brain and spinal cord, stimulated by sensory neurons (integrate and interpret sensory information)

• transmit impulses from the CNS to the muscles or glands (response to stimulus)