The Human Nervous System

The Human Nervous System. 3. Collect data on cold tolerance among … THE HUMAN NERVOUS SYSTEM. 1. Describe how a nerve impulse is transmitted along a neuron. …

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The Human Nervous System
Our senses consist of five general sensesand five special senses. The general senses, receptors for which are scatteredaround the body, are temperature, touch, pain, pressure, and body position.The special senses, receptors for which are found in specialized sense organs,are smell, taste, hearing, vision, and equilibrium. Nerves Spinal cord Brain Sense organs FIGURE 13.1The nervous system. The nervous system includes the brain, spinal cord, sense organs,and the nerves that interconnect those organs. The Human Nervous System 133 Dendritescollect electrical signals. Cell bodycontains a nucleus and organelles. Axondelivers electrical signals to dendrites of another cell or to an effector cell. Terminal boutons FIGURE 13.2The structure of a generalized neuron. A neuron consists of the branching dendrites, the cell body, the axon, and terminal boutons. Nerve impulses are propagated in the direction of the arrows.

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