Question

Observe the reflex arc pathway shown in the flow of the chart given below. Which of the following is represented by X and Y?

A. X - Brain. Y - Sensory neuron
B. X - Spinal cord. Y - Motor neuron
C. X - Brain. Y - Motor neuron
D. X - Sensory neuron. Y - Spinal cord

Answer 1

Hint: A reflex action is an automatic and nearly immediate movement in reaction to a stimulus. When a person unintentionally touches a hot object, they instinctively jerk their hand away. A reflex does not necessitate any mental input.

Complete answer:
The nervous tissue is made up of neurons and forms the brain's tissue system. Reflex action is a nerve-mediated, spontaneous involuntary response to a specific stimulus.
The spinal cord is represented by the letter X. First, sensory organs receive impulses, which are processed by sensory neurons in the dorsal root of the spinal cord, which then sends the impulse from the receptor to Y.
The motor neuron is represented by the letter Y. Motor neurons in the ventral root of the spinal cord carry the brain's impulse to the effector organs. The motor neuron sends an impulse to the effector organs, which they respond to.
As a result, option B is the proper response.
Sensory neurons are the neurons in the brain that translate external stimuli from the environment into internal stimuli. Sensory input activates them, and they transmit projections to other nervous system parts, ultimately conveying sensory information to the brain or spinal cord.
Motor neurons are neurons in the central nervous system that extend their axons outside of the CNS to control muscles either directly or indirectly. The neuromuscular junction is a specialised synapse that connects a motor neuron to a muscle fibre.
Interneurons are neither sensory nor motor; rather, they serve as "middle men" who connect the two types of neurons.
Note: The body's immediate or instantaneous response to an external stimulus is referred to as reflex activities. The reflex arc refers to the neural pathway that is involved in reflex action. Reflex acts are extremely important to humans because they protect the organism from dangerous situations.