Table of Contents
- 1 What is the order of neurons responding to a stimulus?
- 2 What are the 5 components of a reflex arc?
- 3 What is a stimulus response example?
- 4 What is the Generalised order during a nervous response?
- 5 What is the pathway of a reflex arc?
- 6 What are the four phases of of the pain pathway?
- 7 What are the two neurons that stimulate reflexes?
- 8 How are two neurons involved in the knee jerk reflex?
What is the order of neurons responding to a stimulus?
Effectors
| Sensory receptors | These detect the changes in the environment (stimulus) |
|---|---|
| CNS | The central nervous system (CNS), which is the brain and the spinal cord. This coordinates a response and sends a signal down a motor neuron. |
| Motor neurons | Nerve cells that receive a signal from the CNS and transfer it to the effector |
How does a painful stimulus elicit an automatic response from the nervous system?
When a dangerously hot or cold object comes into contact with the skin, it triggers a response from the body’s autonomic nervous system (ANS), which manages bodily functions that are beyond our conscious control, such as breathing and digestion.
What are the 5 components of a reflex arc?
The reflex arc consists of 5 components:
- sensory receptor.
- sensory neuron.
- integration center.
- motor neuron.
- effector target.
What is the neural pathway of pain?
In these situations, the brain may construct pain as a protective mechanism. Specifically, the brain activates neural circuits or pathways of pain that create real pain in the absence of tissue damage. These pathways are, however, reversible due to the brain’s neuroplasticity.
What is a stimulus response example?
Examples of stimuli and their responses: You are hungry so you eat some food. A rabbit gets scared so it runs away. You are cold so you put on a jacket.
How does the body respond to a stimulus?
Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus. Sense organs contain groups of receptors that respond to specific stimuli.
What is the Generalised order during a nervous response?
What is the generalised order during a nervous response? Receptor → stimulus → coordinator → effector → response.
How fast do your nerves react?
In the human context, the signals carried by the large-diameter, myelinated neurons that link the spinal cord to the muscles can travel at speeds ranging from 70-120 meters per second (m/s) (156-270 miles per hour[mph]), while signals traveling along the same paths carried by the small-diameter, unmyelinated fibers of …
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 function of a reflex arc?
Reflex arc, neurological and sensory mechanism that controls a reflex, an immediate response to a particular stimulus.
What are the four phases of of the pain pathway?
There are four major processes: transduction, transmission, modulation, and perception.
What are the 3 pain pathways?
Thus, internationally pain has been classified into three major classes—nociceptive pain, neuropathic pain and inflammatory pain [1]. Primarily, both the CNS and PNS are involved in the mechanism and pathways of all variations of pain perception.
What are the two neurons that stimulate reflexes?
Reflexes. The two neurons are a sensory and a motor neuron. The sensory neuron is stimulated by stretch (extension) of a muscle. Stretch of a muscle normally happens when its antagonist contracts, or artificially when its tendon is stretched, as in the knee jerk reflex. Muscles contain receptors called muscle spindles.
What happens in the correct order in a reflex arc?
Put the following events that occur in a reflex arc in the correct order. 1.A sensory receptor detects a stimulus. 2.A sensory neuron conducts action potentials through the nerve to the spinal cord. 3. The sensory neuron synapses with an interneuron.
How are two neurons involved in the knee jerk reflex?
The two neurons are a sensory and a motor neuron. The sensory neuron is stimulated by stretch (extension) of a muscle. Stretch of a muscle normally happens when its antagonist contracts, or artificially when its tendon is stretched, as in the knee jerk reflex.
Where does the motor neuron conduct action potentials?
5. The motor neuron conducts action potentials through the anterior root and spinal nerve to an effector organ Damage to the ventral root of a spinal nerve would mean that the sensory input of the reflex arc would be interrupted. A reflex arc must involve interneurons for processing in the spinal cord.