PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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somatic and autonomic
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sensory and motor
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parasympathetic and sympathetic
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neurons and anti-neurons
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Detailed explanation-1: -You have two main types of nerves: Sensory nerves carry signals to your brain to help you touch, taste, smell and see. Motor nerves carry signals to your muscles or glands to help you move and function.
Detailed explanation-2: -Sensory nerves contain only afferent fibers, long dendrites of sensory neurons. Motor nerves have only efferent fibers, long axons of motor neurons. Mixed nerves contain both types of fibers.
Detailed explanation-3: -The somatic peripheral nervous system is a single neuron system with the motor neurons lying inside the brainstem or spinal cord and the sensory neurons lying in the dorsal root ganglia. The autonomic peripheral nervous system is a two neuron system with a neuron lying outside of the CNS in the autonomic ganglia.
Detailed explanation-4: -The spinal nerves carry both sensory and motor messages and are called “mixed nerves.” Among the cranial nerves are five pairs of motor nerves, three pairs of sensory nerves, and four pairs of mixed nerves.