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13.1 Sensory Receptors – Anatomy & Physiology. Learning Objectives. By the end of this section, you will be able to: Describe different types of sensory receptors. A major role of sensory receptors is to help us learn about the environment around us, or about the state of our internal environment.
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14 sie 2023 · Sensory receptors occur in specialized organs such as the eyes, ears, nose, and mouth, as well as internal organs. Each receptor type conveys a distinct sensory modality to integrate into a single perceptual frame eventually.
Most receptors detect the stimulus via a subset of highly specialised ion channels which open (Na+) or close (K+) to evoke depolarisation of the membrane of the sensory ending in response to the stimulus. Information sent from the receptors is called AFFERENT information.
Compare and contrast the types of sensory receptors based on the type of stimulus (i.e., thermoreceptor, photoreceptor, chemoreceptor, baroreceptor, nociceptor [pain receptor], mechanoreceptor). A major role of sensory receptors is to help us learn about the environment around us, or about the state of our internal environment.
Introduction. Receptors: Detection and Transduction. Structural Basis of Sensory Receptor Activation. The Logic of Sensory Coding. Evolution and Variation. Concluding Remarks. References. Editors: Lewis Cantley, Tony Hunter, Richard Sever, and Jeremy W. Thorner Additional Perspectives on Signal Transduction available at www.cshperspectives.org.
4 kwi 2023 · Sensory receptors can be classified into external receptors and internal receptors depending on their locations relative to the stimuli. External receptors are responding to the stimuli from the external part of the body and are also called exteroceptors .
A primary sensory cell, on the other hand, is a receptor in which stimulus transduction occurs directly at the nerve cell or nerve ending. Examples of these are the stretch receptor (Fig. 3-1), the olfactory receptors (see Fig. 9-2) and the free nerve endings of the skin, which have various functional specializations.
