KINESIOL 2Y03 Lecture Notes - Lecture 3: Sensory Neuron, Cardiac Muscle, Skeletal Muscle

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Sensory receptors detect changes from the internal and external environment. Activate effectors - muscle (contractions) and glands (secretions) Sensory receptor - the ending of a neuron or separate specialized cells detect changes. Nerves - bundles of axons and their sheaths that connect the cns to sensory receptors, spinal and brain. Ganglia/ganglion - collection of cell bodies, outside of the cns. Plexus - a network of axons and sometimes cell bodies, outside of the cns. Sensory (afferent) - send action potentials to the cns. Motor (efferent) - send action potentials from cns to effectors. Sends action potentials from cns to skeletal muscle. Synapse with skeletal muscle through the creation of a junction between nerve cell and another cell. Neuromuscular junction - junction between nerve cell and skeletal muscle cell. Sends action potentials from cns to smooth muscle, cardiac muscle and some glands. There is plexus in the walls of the digestive tract.

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