BIOA02H3 Lecture Notes - Lecture 4: Autocrine Signalling, Endocrine Gland, Autonomic Nervous System

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Robin Marushia

Document Summary

Ganglia: groups of nerve cell bodies with localized interconnections. In protostomes (very simple nervous system), cell bodies of a ganglion are located on the periphery, with interconnections located in a tangled mass of axons and dendrites, called the neuropile, in the centre. Allows rapid integration of sensory information and more complex reactions to that information. Earliest type of brain you can have. The middle is the dendrites and axon. In flatworms, a small brain (consisting of a pair of ganglia group of cell bodies, at the anterior end) is connected by two or more longitudinal nerve cords to nerve nets in the rest of the body. The brain integrates inputs from sensory receptors, including a pair of anterior eyespots with receptors that respond to light. The brain and longitudinal nerve cords constitute a very simple central nervous system (cns) nerves from the cns to the rest of the body constitute the peripheral nervous system (pns) (sensory input and motor output)