In which situation is the role of a motor nerve shown most directly?
Answer and explanation
Correct answer: A message going from the spinal cord to the muscle to pull the hand away
A motor nerve carries commands from a central nervous-system centre to an effector such as a muscle or gland. In a withdrawal reflex, the spinal cord sends a response through a motor nerve to the arm muscle, causing contraction and movement of the hand away from the hot object. Heat detection by skin and light detection by the retina involve receptors and sensory pathways, while thyroxine production is an endocrine function.
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What is the correct answer to this question?
A message going from the spinal cord to the muscle to pull the hand away
Why is this the correct answer?
A motor nerve carries commands from a central nervous-system centre to an effector such as a muscle or gland. In a withdrawal reflex, the spinal cord sends a response through a motor nerve to the arm muscle, causing contraction and movement of the hand away from the hot object. Heat detection by skin and light detection by the retina involve receptors and sensory pathways, while thyroxine production is an endocrine function.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Reflex action.
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