Reflex action is controlled by:
Correct answer: B. Central nervous system
- A. Peripheral nervous system
- B. Central nervous system
- C. Autonomic nervous system
- D. Circulatory system
Explanation
Reflex actions are involuntary actions that are controlled by the spinal cord, which is a part of the CNS. The spinal cord controls reflex actions by receiving signals from sensory neurons and processing them through a neural pathway called a reflex arc to motor neurons, which then trigger an immediate, involuntary response from muscles or glands. This process bypasses the brain, allowing for rapid reactions to stimuli like touching a hot object or the knee-jerk reflex, which is a classic example of a spinal-cord-controlled reflex.
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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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