Each sensory system consists of:

Options

A. nerve pathways from specific receptors to the brain
B. sensory receptors
C. brain regions that deal with sensory information
D. all of the above

Answer

To answer the question "Each sensory system consists of:", we can break down the components of a sensory system step by step.

### Step-by-Step Solution:

1. **Identify the Components of a Sensory System**:
A sensory system is made up of several key components that work together to process sensory information.

2. **Sensory Receptors**:
The first component is sensory receptors. These are specialized cells or structures that detect specific types of stimuli (e.g., light, sound, pressure, chemicals) from the environment.

3. **Nerve Pathways**:
The second component consists of nerve pathways. These pathways are the neural connections that carry sensory information from the receptors to the brain. They include sensory neurons that transmit signals.

4. **Brain Regions**:
The third component involves specific regions of the brain that process and interpret the sensory information received. Different areas of the brain are responsible for different types of sensory processing (e.g., the occipital lobe for vision, the temporal lobe for hearing).

5. **Conclusion**:
Therefore, each sensory system consists of sensory receptors, nerve pathways from those receptors to the brain, and brain regions that deal with the sensory information.

6. **Final Answer**:
The correct answer to the question is "all of the above," as it encompasses all the components mentioned.