Taste and Smell AP Psychology.

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Presentation transcript:

Taste and Smell AP Psychology

Taste Gustation Papillae: small mucous-membrane projections on the tongue. Taste buds (receptors) line the top and sides of the papillae. Look at Figure 4.12 on page 132

Taste receptors/buds Too small to see One papilla can contain anywhere from 15 to 50 taste receptors. Molecules of the substance are being sensed. Four basic “taste”: Salty Sour Bitter sweet New “taste”: Umani (MSG) found in processed foods (meats/cheese) and Asian dishes…..taste of amino acids.

Papillae Infants have more papillae Elderly have fewer Extremely rare for someone to experience the TOTAL loss of taste.

Tongue Map Myth 1942: study by Edwin Boring at Harvard University …..released the “tongue map” His study was completely wrong!!!! http://www.livescience.com/7113-tongue-map-tasteless-myth-debunked.html 1993 major discovery was made!!! All 5 “taste” can be detected Taste receptors are located on the TONGUE, ROOF OF THE MOUTH, CHEECKS, AND THROAT. Regeneration: within a week to ten days, taste receptors are replaced. Receptors can be destroyed! Age 40 starts to slow down.

Taste Preference Genetic factors (sweets and bitter) Breast-feeding (garlic/vanilla) Cultural background/upbringing

Taste Supertasters: 25% of the general population. Have over 35 receptors in each taste bud. Typically find coffee bitter, perceive certain foods as sweetier, saltier, and “spicy” food are difficult to enjoy. Tasters: 50% of pop. Average number of receptors. Nontasters: 25% of pop. Detects very little flavors(tastes). Perception of taste is less intense.

Olfaction The sense of smell. Shape of the molecule of the chemical substances…lock onto a receptor. 10,000 diff. substances Cilia= (hairs) collect molecules of odor…electrical signal is sent to the olfactory bulbs….sent to the brain. Message is carried along the Olfactory Nerve Nerve to the Olfactory bulb to the Olfactory cortex Sensory info. DOES NOT go through the thalamus Brain processes the message (perception)

Olfaction Triggers emotional memories (temporal lobes and limbic system) Helps in survival

Taste and Smell Without smell we can not fully detect the flavor of foods or drinks.