Question 28
Sense OrgansThe correct sequence for the perception of smell in mammals is
- A.chemicals → olfactory nerve endings → brain
- B.dissolved chemicals → nasal sensory cells → brain
- C.chemicals → mucus membrane → sensory cells → brain
- D.dissolved chemicals → sensory cells → olfactory nerve → brain.
Show the answer and explanation
Answer: D (dissolved chemicals → sensory cells → olfactory nerve → brain.)
Explanation
Chemicals dissolve in the nasal mucus, stimulate sensory cells, and impulses travel along the olfactory nerve to the brain.