Frank smelled a foul odor as he passed a group of cows. What type of receptors is causing his brain to receive this message?
  1. Physical receptors
  2. Chemoreceptors
  3. Cowreceptors
  4. Methane based receptors
Explanation
Answer - B - The sense of smell or olfactory sense occurs because of chemoreceptors inside the nose, which are nerve cells that respond to gasses.
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