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BIO310H5 (13)
Chapter 6

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Department
Biology
Course
BIO310H5
Professor
Angela B Lange
Semester
Winter

Description
Chapter 6 Neuronal signaling and the structure of the nervous systemin order to coordinate the functions of the cells of the human body two control systems exist1 the endocrine system is a collection of bloodborne messengers that work relatively slowly 2 the nervous system is a rapid control system together they regulate most internal functions and organize and control the activities we know collectively as human behavior nervous system is composed of trillions of nerve cells distributed in a network throughout the brain spinal cord and peripherythese cells communicate with each other by electrical and chemical signalsthey maintain homeostasis by coordinating functions of internal organs as well as mediating sensation controlling movements and encoding the mindNeural Tissue 2 parts1 Central Nervous System CNS composed of the brain and spinal cord2 Peripheral Nervous System PNS consisting of the nerves that connect the brain or spinal cord with the bodys muscles glands and sense organs the basic unit of the nervous system is the individual nerve cell or neuron neurons operate by generating electrical signals that move from one part of the cell to another part of the same cell or to neighboring cells in most neurons the electrical signals causes the release of chemical messengers Neurotransmitters to communicate with other cells Neurons serves as integrators because their output reflects the balance of inputs they receive from
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