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Which is the correct sequence of the components of a reflex arc? A Receptors - Muscle - Sensory neuron - Motor neuron - Spinal cord B Receptors - Motor neuron - Spinal cord - Sensory neuron - Muscle C Receptors - Spinal cord - Sensory neuron - Motor neuron- Muscle D Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle

Which is the correct sequence of the components of a reflex arc?

A

Receptors - Muscle - Sensory neuron - Motor neuron - Spinal cord

B

Receptors - Motor neuron - Spinal cord - Sensory neuron - Muscle

C

Receptors - Spinal cord - Sensory neuron - Motor neuron- Muscle

D

Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle

 

Grade:12

2 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
10 months ago
When a receptor is stimulated, it sends a signal to the central nervous system, where the brain coordinates the response. But sometimes a very quick response is needed, one that does not need the involvement of the brain. This is called as the reflex action. In a simple reflex action:
Stimulus -> Receptor -> Sensory neuron -> Relay Neuron -> Motor neuron -> Effector (Muscle).
So, the correct answer is 'Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle
Mayank Ranka
askIITians Faculty 214 Points
10 months ago
When a receptor is stimulated, it sends a signal to the central nervous system, where the brain coordinates the response. But sometimes a very quick response is needed, one that does not need the involvement of the brain. This is called as the reflex action. In a simple reflex action:
Stimulus -> Receptor -> Sensory neuron -> Relay Neuron -> Motor neuron -> Effector (Muscle).
So, the correct answer is 'Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle

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