During an involuntary action, a nerve impulse is passed through a pathway called?
Correct answer: D. Reflex arc
- A. Reflex action of nerve impulse
- B. Reflex action of glands
- C. Reflex arc and reflex action
- D. Reflex arc
Explanation
During an involuntary action, a nerve impulse is passed through a pathway called the reflex arc. So, option D is correct. A reflex arc is the neural pathway that controls a reflex action, which is an involuntary and nearly instantaneous response to a stimulus. It bypasses the brain to allow for a rapid reaction by transmitting the signal directly through the spinal cord, which acts as the control center. A simple reflex arc typically involves a sensory neuron, a relay neuron (interneuron), and a motor neuron, though some may involve fewer neurons.
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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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