Which of the following are chemoreceptors?

Options

A. Taste receptors
B. Olfactory receptors
C. Auditory receptors
D. Both (a) and (b)

Explanation

To determine which of the following are chemoreceptors, we can analyze the options provided: taste receptors, olfactory receptors, auditory receptors, and both A and B.

### Step-by-Step Solution:

1. **Understanding Chemoreceptors**:
- Chemoreceptors are specialized sensory receptors that respond to chemical stimuli. They detect changes in the chemical composition of their environment.

2. **Analyzing the Options**:
- **Taste Receptors**: These receptors are located on the tongue and are responsible for detecting different taste modalities (sweet, salty, sour, bitter, and umami). They respond to chemical substances in food, thus classifying them as chemoreceptors.

- **Olfactory Receptors**: These receptors are located in the nasal cavity and are responsible for the sense of smell. They detect airborne chemical molecules, making them chemoreceptors as well.

- **Auditory Receptors**: These receptors are responsible for hearing and are located in the inner ear. They respond to sound waves (mechanical stimuli) rather than chemical stimuli, so they are not classified as chemoreceptors.

3. **Identifying the Correct Answer**:
- Since both taste receptors and olfactory receptors respond to chemicals, they are both classified as chemoreceptors. Therefore, the correct answer is "both A and B".

### Final Answer:
The correct answer is **both A and B (taste receptors and olfactory receptors)**.

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