What is the pathway of a reflex arc?

A reflex arc defines the pathway by which a reflex travels—from the stimulus to sensory neuron to motor neuron to reflex muscle movement.

What is the correct order of neurons in a reflex arc?

Stimulus, sensory neuron, intermediary neuron, motor neuron and defector organ is the correct order of general reflex arc.

What are the 6 stages of the reflex arc?

Reflex actions

• Receptor in the skin detects a stimulus (the change in temperature).
• Sensory neurone sends impulses to relay neurone .
• Motor neurone sends impulses to effector.
• Effector produces a response (muscle contracts to move hand away).

What part of the reflex arc carries out the motor response?

Sensory cells carry input from the receptor (afferent impulses) to a central interneuron, which makes contact with a motor neuron. The motor neuron carries efferent impulses to the effector, which produces the response.

What is the role of the sensory receptor in a reflex arc?

Sensory neurons are the cells that contain sensory receptors. They send information from the body to the central nervous system, the brain and spinal cord. In a reflex arc, the sensory neuron sends a signal to the interneuron and activates it. The interneuron then relays that signal to the next neuron, a motor neuron.

What is the reflex arc quizlet?

Definition : A reflex arc is the nerve pathway which makes such a fast, automatic response possible. How a reflex arc works: Sensory neuron from spinal cord touches/feels receptor.

What are the 5 steps of a reflex arc?

So the reflex arc consists of these five steps in order-sensor, sensory neuron, control center, motor neuron, and muscle. These five parts work as a relay team to take information up from the sensor to the spinal cord or brain and back down to the muscles.

What is the proper order of neurons in the reflex arc from first to last quizlet?

Place the following events of a reflex arc in the correct order: 1) motor neuron activation, 2) sensory neuron activation, 3) sensory receptor activation, 4) Information processing, 5) effector response.

What are inter neurons?

Interneurons (also known as association neurons) are neurons that are found exclusively in the central nervous system. This abundance of interneurons is due to the complexity of integrating the sensory and motor segments of the nervous system and the diversity of functions that exist in the brain and spinal cord.

What are the 5 parts of a reflex arc?

The pathway can be described as a ‘reflex arc’ which is made up of 5 components:

• A receptor – muscle spindle.
• An afferent fibre – muscle spindle afferent.
• An integration centre – lamina IX of spinal cord.
• An efferent fibre – α-motoneurones.
• An effector – muscle.

What is the role of sensory receptors?

The sensory receptors transform external energies into changes in the membrane potential. All sensory receptors have some mechanisms in common, such as detection, amplification, discrimination, and adaptation.

What is the role of the sensory receptor in a reflex arc quizlet?

Terms in this set (5) Sensory receptors (dendritic endings of a sensory neuron) respond to both external and internal stimuli, such as temperature, pressure, or tactile changes. Information from nerve impulse is processed in the integration center by interneurons.

What is the function of the reflex reflex arc?

Reflex Arc A sensory receptor detects a stimulus. A sensory neuron conducts action potentials through the spinal nerve and dorsal root to spinal cord. in the spinal cord,the sensory neuron synapses with an interneuron The interneuron synapses with motor neuron.

What is an example of reflex action?

A reflex action follows this general sequence and does not involve the conscious part of the brain. This is why the response is so fast. The nerve pathway followed by a reflex action is called a reflex arc. For example, a simple reflex arc happens if we accidentally touch something hot.

How is a Reflex Impulse sent to the muscles?

Answers: In reflex actions, a reflex arc is formed by impulses from the receptor reaching the spinal cord and the appropriate reflex impulse then being sent to the muscles by the spinal cord. The impulse is not sent to the brain, to reduce response time.

How does the neural pathway control the reflexes?

The neural pathway that controls the reflexes occurs through the reflex arc. It acts on an impulse even before it reaches the brain. There are some stimuli that require an automatic, instantaneous response without the need of conscious thought. The following diagram shows the reflex arc pathway.