Which of the following statements regarding different types of neurons is most accurate? A.Sensory neurons and interneurons are both afferent neurons, while motor neurons are efferent neurons.B.Motor neurons are efferent neurons, sensory neurons are afferent neurons, and interneurons are neither.C.Motor neurons and interneurons are both efferent neurons, while sensory neurons are afferent.D.Motor neurons are afferent neurons, sensory neurons are efferent neurons, and interneurons are neither.
Question
Which of the following statements regarding different types of neurons is most accurate? A.Sensory neurons and interneurons are both afferent neurons, while motor neurons are efferent neurons.B.Motor neurons are efferent neurons, sensory neurons are afferent neurons, and interneurons are neither.C.Motor neurons and interneurons are both efferent neurons, while sensory neurons are afferent.D.Motor neurons are afferent neurons, sensory neurons are efferent neurons, and interneurons are neither.
Solution
The most accurate statement regarding different types of neurons is B. Motor neurons are efferent neurons, sensory neurons are afferent neurons, and interneurons are neither.
Here's why:
Afferent neurons, also known as sensory neurons, carry nerve impulses from receptors or sense organs toward the central nervous system. This means they bring information in, hence they are afferent.
Efferent neurons, also known as motor neurons, carry nerve impulses away from the central nervous system to effectors such as muscles or glands. This means they bring information out, hence they are efferent.
Interneurons, also known as connector neurons or association neurons, are located within the central nervous system and carry messages between sensory and motor neurons. They are neither afferent nor efferent.
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