SOC 32 Lecture Notes - Lecture 4: Nucleolus, Central Canal, Schwann Cell
Document Summary
Responding to the environment: sensation > monitors events/changes inside and outside body, known as stimuli and monitored by sensory neurons with receptors on their body surface and internally. Integration > the parallel processing and interpretation of sensory information to determine the appropriate response (e. g. reflexes, movements, homeostasis: movement > motor output > the activation of muscles or glands, typically via the release of neurotransmitters. The central nervous system is highly cellular, since it has more than 100 billion neurons with each 1000- 10. 000 synapses neurons: neurons are functional, signal conducting cells, glia are supporting cells. Immune surveillance (not only clearing viruses, but also for clearing up useless cells) Neurons: soma, dendrites, axon, axon hillock where action potential is generated, myelin, axon terminal (bouton, collateral axons, synapse. If the brain is nissl stained, you can clearly see the cortical layers. Is the receptive area for incoming signals (axons from other neurons)
