In a reflex arc, the cell body of sensory neuron is located at _.
Correct answer: D. Dorsal root ganglion
- A. Ventral root ganglion
- B. Grey matter of spinal cord
- C. White matter of spinal cord
- D. Dorsal root ganglion
Explanation
The cell body of the spinal sensory afferent is in the dorsal root ganglion (the cranial equivalent is the nucleus of the cranial nerve). This is the afferent limb of the reflex arc. Hence, option D is the correct option.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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