GED Science TestLife ScienceEasy
A medical student is studying the human nervous system. They learn that a specific neuron transmits signals from sensory receptors in the skin to the central nervous system, where the information is processed. This type of neuron is best classified as a:
- ASensory neuron
- BMotor neuron
- CInterneuron
- DNeurotransmitter
Show answer & explanationAnswer & explanation
Correct answer: A. Sensory neuron
Sensory neurons (also called afferent neurons) are responsible for transmitting sensory information from peripheral receptors to the central nervous system for processing.
Why the other options are wrong
- B. Motor neurons (efferent neurons) transmit signals *from* the CNS to muscles or glands, initiating a response.
- C. Interneurons are found *within* the CNS and connect sensory and motor neurons, facilitating communication.
- D. A neurotransmitter is a chemical messenger, not a type of neuron.
Sensory Neuron
A neuron that transmits sensory information from receptors in the periphery (e.g., skin, organs) to the central nervous system (brain and spinal cord) for interpretation.
- Also known as afferent neurons.
- Detect stimuli (light, touch, temperature, pain, etc.).
- Part of the peripheral nervous system that connects to the CNS.
Memory trick: Sensory Sends, Motor Moves, Inter Connects.