Question

__________ allow people to smell different aromas and taste sweet, salty, and sour foods.

○ pain receptors
○ chemoreceptors
○ photoreceptors
○ thermoreceptors

Explanation:

Chemoreceptors detect chemical stimuli. Smelling (olfaction) and tasting (gustation) involve detecting chemical substances (aromas for smell, and chemicals in sweet, salty, sour foods for taste). Pain receptors detect tissue damage (pain), photoreceptors detect light (vision - related), and thermoreceptors detect temperature changes. So, chemoreceptors are the correct choice for the functions described (smelling and tasting).

Answer:

B. Chemoreceptors