Which of the following structures is directly responsible for detecting odor molecules in the human sensory system?

• A. Taste buds
• B. Olfactory receptor cells
• C. Cochlear hair cells
• D. Rods and cones

Answer: (B)

Verified step by step guidance

1. Understand the question: The problem is asking which structure in the human sensory system is responsible for detecting odor molecules. This involves understanding the role of sensory cells in detecting specific stimuli.
2. Review the options: The options provided are 'Taste buds,' 'Olfactory receptor cells,' 'Cochlear hair cells,' and 'Rods and cones.' Each of these structures is specialized for detecting different types of stimuli.
3. Clarify the function of each option: Taste buds are responsible for detecting taste molecules (gustation). Olfactory receptor cells are specialized for detecting odor molecules (olfaction). Cochlear hair cells detect sound vibrations (hearing). Rods and cones are photoreceptor cells in the retina responsible for detecting light (vision).
4. Focus on the correct sensory system: Since the question is about detecting odor molecules, the relevant sensory system is olfaction, which is the sense of smell.
5. Identify the correct structure: Olfactory receptor cells, located in the nasal cavity, are directly responsible for detecting odor molecules. These cells bind to odorant molecules and send signals to the brain for processing.