BPK 105 Lecture Notes - Lecture 4: Skeletal Muscle, Homeostasis, Myelin
16 Jun 2016
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8. 1 functions of nervous system: receive sensory input, via sensory receptors that sense internal & external stimuli. Pns: links cns to various parts of the body conducts ap between receptors - cns and between cns muscles & glands. Sensory division: (afferent) conducts ap from sensory receptors cns: via sensory neurons. Eccentric ns: sensory and motor neurons contained in the digestive tract: can function w/o cns/pns input. Cns: controls structures like glands, smooth muscle and cardiac muscles. Neurons: nerve cells that receive stimuli, conduct ap & transmit signals. In sensory neurons conduct ap towards cns. In motor neurons conduct ap away from cns. Neurons classified according to their location and function. Nucleus: cluster of cell bodies and their dendrites in the cns. Ganglion: cluster of cell bodies and their dendrites in the pns. Tract: bundles of axons and their myelin sheaths in the cns. Nerve: bundles of axons and their myelin sheaths in the pns.
