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Template : THE WORLD THROUGH OUR SENSES PT2
Monday, September 29, 2014 ? 0 Atashinchi ?
The nose is sensory organ for smell.2. Cells sensitive to smell (smell receptors) are found on the top of the
nasal cavity.
3. When we have a cold or flu, a lot of mucus is produce. The smell
receptors are surrounded by this thick layer of mucus and vary little of
chemical vapor gets to the smell receptors. Therefore, the smell
receptors do not get stimulated enough to effectively function as a
sensory organ of smell.
4. The sensitivity of the nose towards stimuli is influenced by the
following factors:
i. The strength of the smell. A stronger smell will be detected by the
nose easily compared with a weaker smell.
ii. The presence of mucus in the nose. A lot of mucus will reduce the
sensitivity of the nose.
The inside of the nasal cavity produce mucus
↓
The chemical vapor entering nose during breathing
dissolves in mucus. The dissolve chemicals
stimulates the smell receptor at the top of the nasal
cavity.
↓
The smell receptor then produce impulse which are
sent through the nerves to the brain
↓
The brain interprets / evaluates the smell
