BIOL 0130 Lecture Notes - Lecture 4: Limbic System, Reflex Arc, Temporal Lobe

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Functions of the nervous system: communication and coordination. Adapt and respond to changes from both inside and outside the body: site of reasoning- you brain. Central nervous system: brain and spinal cord. Peripheral nervous system: all of the other neurons ex. motor and sensory neurons. Dendrites- carry impulses towards the cell body. Axon carry impulses away form the cell body: myelin sheath- makes everything more efficient (made of schwann cells, gaps between the cells nodes of ranvier) Axon terminal branches: terminal branch end in synaptic knobs. Afferent or sensory neurons in pns carry message from sensory receptors to cns. Interneurons or association neurons in cns integrate input. Efferent or motor neurons in pns carry message from cns to muscles or glands. Don"t have control over motor neurons and they do not have the ability to move. Key players: ions k+ (potassium) and na+ (sodium, active pump- sodium/potassium (na+/k+) pump.

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