**Question:** Neuro-epithelium type of sensory receptors are present in the following system except

A. Nociceptors
B. Mechanoreceptors
C. Thermoreceptors
D. Chemoreceptors

**Correct Answer:** .

**Core Concept:** Neuro-epithelium type of sensory receptors are specialized cells that detect various stimuli within the body and transmit information to the central nervous system. These receptors are found in the sensory ganglia, which are located in the dorsal root ganglia (DRGs) of the spinal cord and peripheral nerves. The neuro-epithelium type of sensory receptors include nociceptors, mechanoreceptors, thermoreceptors, and chemoreceptors.

**Why the Correct Answer is Right:** The correct answer, option D (Chemoreceptors), is right because chemoreceptors are specialized cells that detect chemical stimuli, such as odor, taste, and chemical irritants. They are primarily found in the respiratory and digestive systems, as well as the respiratory tract, nasal mucosa, and taste buds. Chemoreceptors are not typically located in the peripheral nerves, where the other options are found.

**Why Each Wrong Option is Incorrect:**

A. Nociceptors: These receptors detect noxious stimuli, such as pain, heat, and chemical irritants. They are present in the peripheral nerves and dorsal root ganglia.
B. Mechanoreceptors: These receptors sense mechanical stimuli, such as pressure, vibration, and shear forces. They are found in the peripheral nerves and sensory ganglia.
C. Thermoreceptors: These receptors detect changes in temperature, such as hot and cold sensations. Thermoreceptors are located in the peripheral nerves and sensory ganglia.

**Clinical Pearl:** The distinction between the types of sensory receptors is crucial for understanding the appropriate response to various stimuli within the body. A correct identification of receptor types helps in assessing and diagnosing patients with sensory deficits, neuropathies, or pain disorders.