What is an example of a reflex in the nervous system?

Reflexes can be altered by impulses from higher levels of the central nervous system. For example, the cough reflex can be suppressed easily, and even the gag reflex (the movements of incipient vomiting resulting from mechanical stimulation of the wall of the pharynx) can be suppressed with training.

What parts of the nervous system are involved in a reflex?

The five parts of most reflexes are:

A sensor, which is a receptor that senses or detects a change.
A sensory neuron (nerve cell) that carries the message from the sensor to the spinal cord.
An interneuron, which is an in-between neuron, like a relay station between neurons.

How does the nervous system work during a reflex action?

A reflex action often involves a very simple nervous pathway called a reflex arc. A reflex arc starts off with receptors being excited. They then send signals along a sensory neuron to your spinal cord, where the signals are passed on to a motor neuron. As a result, one of your muscles or glands is stimulated.

What are some examples of reflex actions?

A few examples of reflex action are:

When light acts as a stimulus, the pupil of the eye changes in size.
Sudden jerky withdrawal of hand or leg when pricked by a pin.
Coughing or sneezing, because of irritants in the nasal passages.
Knees jerk in response to a blow or someone stamping the leg.

What is the function of reflex arc?

A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.

What are the 5 components of the reflex arc?

FIGURE 7-1 A reflex arc contains five fundamental components: 1, a receptor; 2, a sensory neuron; 3, one or more synapses in the CNS; 4, a motor neuron; and 5, a target organ, usually a muscle.

What are the 2 main divisions of the nervous system?

The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

What is the significance of reflex action?

A reflex action is an automatic (involuntary) and rapid response to a stimulus, which minimises any damage to the body from potentially harmful conditions, such as touching something hot. Reflex actions are therefore essential to the survival of many organisms.

What is reflex action and its types?

There are two types of reflex arcs:the autonomic reflex arc, affecting inner organs, and the somatic reflex arc, affecting muscles. By contrast, in polysynaptic reflex arcs, one or more interneurons connect afferent (sensory) and efferent (motor) signals.

Where does reflex action occur in the nervous system?

Reflex action is the result of the coordination of the spinal cord and peripheral nervous system. This action does not involve the brain. The pathway in which impulses travel during the reflex action is called a reflex arc.

Which is an example of a reflex arc?

For example, a simple reflex arc happens if we accidentally touch something hot. 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 are the three types of action in the nervous system?

The neural system controls three types of actions: voluntary action, involuntary action, and reflex action.

Which is an example of the peripheral nervous system?

For example, we adjust our eyes when exposed to bright light. Peripheral nervous system (PNS) is a system of nerves which connect central nervous system (CNS) (includes brain and spinal cord) with other parts of the body. Reflex action is the result of coordination of spinal cord and peripheral nervous system.

What is an example of a reflex in the nervous system? Reflexes can be altered by impulses from higher levels of the central nervous system. For example, the cough reflex can be suppressed easily, and even the gag reflex (the movements of incipient vomiting resulting from mechanical stimulation of the wall of the pharynx) can…