Dorsal root of spinal nerves contain only __________ ?
Correct answer: B. Receptor neurons
- A. Effectors neurons
- B. Receptor neurons
- C. Stimulators
- D. Detector neurons
Explanation
The dorsal root of a spinal nerve carries sensory, or afferent, fibres entering the spinal cord from receptors. Motor fibres leave through the ventral root, so students may choose effectors neurons by confusing the destination of motor impulses with the sensory input carried by the dorsal root.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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