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Beyond vision and hearing lies a rich network of senses quietly shaping every moment of your experience. This lesson from Section 5.5 of OpenStax Psychology 2e explores the chemical senses of taste and smell, the body senses of touch, temperature, and pain, and the inner-ear systems that keep you balanced and spatially aware. From the emerging evidence for a sixth taste receptor for fat to the genetics behind a dog's extraordinary sense of smell, the content reveals just how much sensory machinery operates beneath our conscious awareness. In this video: • Taste buds and the six proposed taste groupings, including umami and the emerging evidence for fat as a distinct taste • How taste receptor cells work and why burning your tongue causes no permanent damage (they regenerate every 10–14 days) • Olfactory receptors and why dogs, with 800–1,200 functional olfactory genes versus fewer than 400 in humans, perceive an entirely different chemical world • Pheromonal communication in animals and why its role in human behavior remains heavily debated • The four skin mechanoreceptors (Meissner's corpuscles, Pacinian corpuscles, Merkel's disks, and Ruffini corpuscles) and how they detect touch, pressure, and vibration • Inflammatory pain vs. neuropathic pain, and what congenital insensitivity to pain reveals about why feeling pain is adaptive • The vestibular system, proprioception, and kinesthesia — how fluid-filled inner-ear organs, muscle stretch receptors, and joint signals combine to maintain balance and body awareness #OpenStax #Psychology #Sensation #Neuroscience #IntroToPsychology OpenStax Content adapted from "OpenStax Psychology 2e", by OpenStax licensed under CC BY 4.0. Content based on Web Version: Apr 23, 2026. Read the textbook online https://openstax.org/details/books/psychology-2e Music first girl talking to me. by ikkun (ex. Barradeen) | https://soundcloud.com/ikkunwastaken Royalty Free Music by https://www.free-stock-music.com Creative Commons / Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) https://creativecommons.org/licenses/by-sa/3.0/deed.en_US
Answer each question based only on what was covered in the video lesson. No outside knowledge is needed — all answers can be found in the video.
Answer each question using what you learned in the video. For multiple-choice questions, select the best answer; for short-answer questions, write 1–3 sentences in your own words.
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