The nose contains skin, cartilage, and fat along with a few bones. Two nostrils lead to the nasal conchae and spiral passages containing mucous membranes. The cubiform plate contains the olfactory epithelium which contains olfactory receptor cells to detect odor molecules. The tongue, pharynx, larynx, and salivary glands all play a role in taste. The tongue contains a large concentration of papilla, bumps that contain the taste buds and gustatory cells. All taste buds have the ability to sense all flavors, including umami and plain water. Genetics can also impact flavors, especially of compounds like PTC. Nociceptors detect pain while mechanoreceptors register touch. Baroreceptors can register blood pressure and trigger changes in blood vessels, while proprioceptors communicate joint position.
Five main taste categories are sweet, salty, bitter, sour, and umami
Genetics plays a role in the sense of taste (as illustrated by PTC paper)
The sense of touch is due to stimulation of nociceptors (for pain) and mechanoreceptors (for physical distortion)
Pain receptors are sensitive to temperature change, mechanical damage, and caustic chemicals
The sensation from mechanical distortion is due to tactile receptors
Did you know…
Q: Why can’t you tickle yourself?
A: Being tickled involves the tickler being in charge of where they’re touching the other person. If a person tries to tickle their own self, they are aware of where they’re going at any given moment and there is no element of surprise. The unknown in terms of which sensory neuronal networks will be stimulated is what makes tickling possible
Smell, Taste & Touch
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book is the ninth edition of the top-selling Human Anatomy & Physiology text and the authors have produced the most accessible, comprehensive, up-to-date and visually stunning anatomy & physiology textbook on the market.. It presents information in smaller and more digestible bites, making it easier to read and navigate.
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