Kinesiology 2000A/B Lecture Notes - Lecture 6: Citric Acid, Trachea, Cardiac Output

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Organs: skin, hair, sweat glands, and nairls. Functions: protects against environmental hazards and helps regulate body temp and provides sensory information. Organs: brain, spinal cord, peripheral never and sense orgains. Functions: directs response to stimuli, coordinates activities of other organ systems, provides and interpretys sensory info about external stimuli. The nervous system is divided into two types: cns: central nervous system (brain and spinal cord, pns: peripheral nervous system (sensory and motor neurons) The building block of the nervous system, neurons, transmit information throughout the entire body. Irritability (or excitability) refers to the ability of the neuron to respond to stimulation. The nucleus of the neuron is contained in the cell body (soma) Dendrites carry nerve impulses toward the cell body. Speed of the nerve impulse depends on if it is surrounded by myelin (myelinated axons are up to 50x faster)

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