BRAIN
SPINAL CORD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Reflexes
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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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Explanation:
Detailed explanation-1: -The first is a sensor, which senses what is happening to the body, the second is a sensory neuron to carry that information to the spinal cord, and the third is a motor neuron to transmit information away from the spinal cord to the fourth part, which is the muscle that creates an action.
Detailed explanation-2: -The simplest entirely neuronal reflex arc consists of two neurones only.
Detailed explanation-3: -In a two-neuron arc, simple reflexes are prompt, short-lived, and automatic and involve only a part of the body. Examples of simple reflexes are the contraction of a muscle in response to stretching, the blink of the eye when the cornea is touched, and salivation at the sight of food.
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