The reflex action is the phenomenon which only involves:
Correct answer: B. Receptors, effectors, and spinal cord
- A. Receptors and effectors
- B. Receptors, effectors, and spinal cord
- C. Brain, receptors, and spinal cord
- D. Receptors, neurons, and the brain
Explanation
In a reflex action, the stimulus is sansed by receptors, travels via sensory and relay neurons within the spinal cord, and activates the effector, without involvement of the brain.
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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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