AP PSYCHOLOGY

SENSATION AND PERCEPTION

VISION SENSORY AND PERCEPTUAL PROCESSING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Once the tastant comes into contact with the gustatory hair that is within the taste bud, what happens next in the process of taste sensation-taste perception?
A
Then the sensation of the taste that you will have will be sent to the gustatory cortex
B
Then the gustatory hair decides what taste it will be out of the five basic tastes
C
Then the gustatory cortex receives information and perception has been achieved
D
Then the gustatory hair transmits these chemical molecules through to the taste receptors within the taste bud
Explanation: 

Detailed explanation-1: -Tastant binding to the receptor activates downstream secondary messenger pathways leading to depolarization and increased intracellular calcium in TRCs, that in turn innervate the gustatory cortex in the brain.

Detailed explanation-2: -Taste buds are onion-shaped structures of between 50 and 100 taste cells, each of which has fingerlike projections called microvilli that poke through an opening at the top of the taste bud called the taste pore. Chemicals from food termed tastants dissolve in saliva and contact the taste cells through the taste pore.

Detailed explanation-3: -A long microvilli, or gustatory hair, from each gustatory receptor cell within the taste bud projects through the taste pore. Gustatory hairs generate action potentials when stimulated by chemicals that are dissolved in the saliva. Basal cells are actively dividing epithelial cells.

Detailed explanation-4: -Taste buds are sensory end organs that are located in the oral epithelium (BOX 1). The receptors on the chemosensitive apical tips of taste bud cells confer specificity to gustatory stimuli. Taste receptors come in many types, including several classes of G protein-coupled receptors (GPCRs) and ion channels (FIG.

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