senses+dw

Senses

14.1 Define sensory receptors. 274 Structure that receives either external or internal environmental stimuli and is a part of a sensory neuron or transmits sinals to a sensory neuron. Give examples of exteroceptors. 274 Taste Smell Vision Hearing Equilibrium Give examples of interoceptors. 274 Pressoreptors Osmoreceptors Chemorecptors Which type of receptors only detect information and send information to the brain but do not regulate the body's homeostasis. 274 perception Describe (in detail) and give examples of each of the following receptor types...(274) Chemoreceptors-they respond to chemical substances in the immediate vicinity. Taste and smell depend on this type of sensory receptor, but certain chemoreseptors in various other organs are sensitive to internal conditions.The ones the monitor blood and pH are located in the carotid arteries and aorta. I pain receptors- they are a type of chemoreceptor. They are naked dendrites that respond to shemicals released by damage tissues. Pain receptors are protective, because they alert us to possible danger. Photoreceptors- they respond to light energy. Our eyes contain them and they are sensitive to light rays which provides us with vision. Mechanoreceptors- they are stimulated by mechanical forces, which most often result in pressure of some sort. When we hear, airborne sound waves are converted to fluid borne pressure waves that can be deceted by the mechanorecptors. Thermoreceptors- they are located in the hypothalamus and skin and stimulate by changed in temperature. Those that respon when temperature rises are called warmthe receptors,a nd those that respond when temperatures lower are called cold receptors. Explain in a five point paragraph the sense of taste (278), smell (278) or vision (280). Approximately 80-90% of what we perceive as “taste” actually is due to the sense of smell, which accounts for how dull food tastes when we have a head cold or a stuffed-up nose. Our sense of smell depends on olfactory cells located with olfactory epithelium high in the roof of the nasal cavity. Olfactory cells are modified neurons Each cell ends in a tuft. The tuft is about five olfactory cilia, which bear receptor proteins for odor molecules.