Motor neurons and sensory neurons

Explanation

### Step-by-Step Solution

1. **Definition of Motor Neurons**:
- Motor neurons are specialized nerve cells that transmit signals from the central nervous system (CNS) to effector organs, such as muscles and glands. They are responsible for initiating and controlling voluntary and involuntary movements.

2. **Definition of Sensory Neurons**:
- Sensory neurons are nerve cells that carry signals from sensory receptors (which respond to external stimuli) to the central nervous system. They convert external stimuli (like light, sound, and touch) into internal electrical impulses.

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