Macula of internal ear refers to

Options

A. Yellow spot
B. Ridge present in otolith organ
C. Ridge present in basilar membrane
D. Crista ampullaris of semicircular canal

Answer

To solve the question "Macula of internal ear refers to," we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Macula":**
- The macula is a specific structure located in the inner ear, particularly within the vestibular apparatus.

2. **Identify the Location of Macula:**
- The vestibular apparatus consists of two main parts: the saccule and the utricle. Each of these parts contains a macula.

3. **Describe the Structure of Macula:**
- The macula is described as a projecting ridge and is composed of a patch of hair cells. These hair cells are sensory receptors.

4. **Function of Macula:**
- The primary function of the macula is to detect linear acceleration and changes in head position. It plays a crucial role in balance and spatial orientation.

5. **Evaluate the Options:**
- **Option 1:** Yellow spot - This refers to a part of the eye, not the ear, so it's incorrect.
- **Option 2:** Ridge present in otolith organ - This is correct as the macula is indeed part of the otolith organs located in the saccule and utricle.
- **Option 3:** Ridge present in basilar membrane - This is incorrect as the basilar membrane is related to the cochlea and sound perception, not the macula.
- **Option 4:** Crystal ampullaries of semicircular canal - This is also incorrect as it refers to a different structure involved in rotational movement.

6. **Conclusion:**
- The correct answer is that the macula of the internal ear refers to the "ridge present in otolith organ."

### Final Answer:
The macula of internal ear refers to the ridge present in the otolith organ.

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