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Chapter 9
The Sensory System
| Term | Definition |
|---|---|
| Mechanoreceptors | Sensors that detect pressure on the skin, stretching in the muscles, and body movements. |
| Thermoreceptors | Receptors that detect changes in the internal and external changes of the body. |
| Pain receptors | Stimulated by damage or oxygen deprivation to tissues. |
| Chemoreceptors | Stimulated by changes in chemical concentrations. Examples include taste buds and the sense of smell. |
| Photoreceptors | Stimulated by light energy. |
| Thalamus | The sensory relay center for the brain. |
| Proprioceptors | A type of mechanoreceptor that is involved in reflex actions that maintain muscle tone, body equilibrium, and posture. |
| Cutaneous Receptors | Found in the deepest layer of the epidermis and all of the dermis, these receptors give the skin the sensitivity to touch, pressure, pain, and temperature. |
| Pain Receptors (Nociceptors) | There are somatic pain receptors found in the skin and muscles as well as visceral pain receptors that are found in the organs. |
| Referred Pain | Pain from the organs can often be felt in the skin due to the sensations traveling the same route to the spinal cord. |
| Taste Buds | The sensory receptors that are responsible for taste. Taste buds are embedded in the epithelium on the tongue and papillae. |
| Olfactory Cells | Olfactory cells are located on the roof of the nasal cavity and are modified neurons. These cells are responsible for the sense of smell. |
Created by:
Mr.Klein
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