What is the sequence of events in a typical reflex arc?

Answer 1

1. receptor detects a stimulus - change in the environment
2. sensory neurone sends signal to relay neurone
3. motor neurone sends signal to effector
4. effector produces a response

Answer 2

As your nerve touches the stimulus (the object causing the pain), it sends a shock straight through your central nervous system. First the shock passes through your sensory neuron which is in your spinal cord. Next the shock travels to the relay neuron which then sends the shock onto the motor neuron straight to the effector (which is often a muscle). Your effector then responds to the shock by taking the nerve away from the receptor. When this procedure is complete the shock that had been created at the start of the reflex arc has travelled straight through your central nervous system.

Answer 3

The steps involved in a reflex arc start with a stimulus at a sensory neuron, travel of the stimulus by way of the sensory neuron to the spinal cord. At a relay or interneuron in the cord, the stimulus now travels by way of a motor neuron to a muscle (or gland). The muscle responds. A good example of this is what happens if a person touches a very hot surface. They will rapidly pull the hand away.

Answer 4

Most reflex arcs have three parts: sensory info in via sensory neuron, synapsis at an interneuron (in the spinal cord), synapsis out of interneuron to a motor neuron and a motor response. The interneuron also sends info to the brain and the person become aware of it. This is a more common reflex.

Some reflex arcs have only the sensory neuron info in and the motor out. The knee jerk reflex is an example. These are more rapid.

Answer 5

A typical reflex arc involves sensory receptor detecting a stimulus, sensory neuron conveying the signal to the spinal cord, interneuron within the spinal cord processing the information, motor neuron carrying the response signal to the effector organ, and finally, the effector organ (muscle or gland) producing the reflex response.

Answer 6

receptor, sensory neurone, CNS, motor neurone, and effector

Answer 7

Receptor; Effector

Answer 8

right atrium,aorta and left ventricle