chemical senses

2. Chemicals Senses:
It Tastes Good and
Smells Even Better

3. Gustation

4. Taste (Gustation)•7.6 How do the senses of taste and smell work, and how are they alike?

5. How does the sense of taste work?• Tastants, chemicals in foods, are detected by
taste buds, located in papilae.
• Each person has 5-10,000 taste buds which
have sensory cells (50-100 per taste bud) for
different chemical tastants (sugars, salts,
acids).
• When the sensory cells are stimulated it sends
a message down the nerve fibers to the
thalamus.

6. The Five Basic Tastes
SOUR
BITTERSWEET
UMAMI
SALTY

7. Smell (Olfaction)
1. Molecules hit the epithelium 2. Activate the cilia
3. Goes to olfactory bulb which sends message to brain