NERVOUS SYSTEM SPECIAL SENSE
SPINALCORD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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are never homeostatic
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are automatic sympathetic responses to a stimulus.
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cannot be suppressed by higher brain functions
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are always simple pathways containing three neurons.
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Detailed explanation-1: -It is innervated by a motor neuron carrying information about the response. In most cases, three neurons are involved in a reflex arc. However, sometimes it might have only two neurons i.e. a sensory neuron and an effector neuron.
Detailed explanation-2: -Most reflex arcs involve only three neurons. The stimulus, such as a needle stick, stimulates the pain receptors of the skin, which initiate an impulse in a sensory neuron.
Detailed explanation-3: -There are many different types of reflexes, but the most basic is called a simple reflex. A simple reflex contains only one space where information in the spinal cord travels between two nerve cells, called neurons.
Detailed explanation-4: -Reflex actions There are three main types of neuron: sensory, motor and relay. These different types of neurons work together in a reflex action .
Detailed explanation-5: -There are two types of reflex arcs:the autonomic reflex arc, affecting inner organs, and the somatic reflex arc, affecting muscles. When a reflex arc consists of only two neurons, one sensory neuron, and one motor neuron, it is defined as monosynaptic.