Question

Which of the following represents the five components of a reflex arc in the correct sequence?

Answer 1

A reflex arc consists of five components in the following order: sensory receptor, sensory neuron, integration center, motor neuron, and effector. It allows for an involuntary and rapid response to a stimulus without direct brain involvement.

Step-by-step explanation:

The sequence of a reflex arc is integral to understanding how reflexive actions occur in response to stimuli. The five components of a reflex arc include: (1) sensory receptor, (2) sensory neuron, (3) integration center, (4) motor neuron, and (5) effector.

An example of this is when a person touches a hot pot and the immediate response is to the arm back. The sensory receptors in the skin detect the painful heat, triggering a nerve impulse that travels through a sensory neuron to the spinal cord. Here, an integration center, typically involving one or more interneurons, processes the information and formulates a response.

The motor neuron then carries the signal away from the spinal cord to the effector, which is usually a muscle or gland. The effector acts in response to the stimulus, leading to a rapid withdrawal from the hot object. Reflex arcs are a fundamental aspect of the nervous system, illustrating the body's ability to produce a quick, involuntary action to certain stimuli without direct involvement from the brain.

Answer 2

The correct sequence for the five components of a reflex arc is Receptor, Sensory Neuron, Integration Center, Motor Neuron, Effector. Therefore, the correct option is A.

Step-by-step explanation:

In a reflex arc, sensory receptors detect a stimulus, and the sensory neuron transmits the signal to the integration center (usually the spinal cord), which processes the information. The motor neuron then carries the response from the integration center to the effector (muscle or gland), producing the reflex action. Option A accurately reflects this sequential flow of events in a reflex arc, ensuring a coordinated and rapid response to a stimulus.

Therefore, the correct option is A.

Your question is incomplete, most probably the complete question is:

Which of the following represents the five components of a reflex arc in the correct sequence?

A. Receptor, Sensory Neuron, Integration Center, Motor Neuron, Effector

B. Motor Neuron, Integration Center, Sensory Neuron, Receptor, Effector

C. Effector, Integration Center, Receptor, Sensory Neuron, Motor Neuron

D. Sensory Neuron, Motor Neuron, Receptor, Integration Center, Effector