What are examples of reflex actions?

What are 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 are the 4 types of reflexes?

In our discussion we will examine four major reflexes that are integrated within the spinal cord: the stretch reflex, the Golgi tendon reflex, the withdrawal reflex and the crossed extensor reflex.

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.

How is the reflex similar to the hammer tapping the knee?

•Here is a similar reflex in the arm, showing muscle length. • The weight dropping into the hand is the stimulus. Like the hammer tapping the knee, it stretches a muscle. • The response is the muscle contracting, jerking the arm up. How the Message Travels From the Receptor to the Effector.

What causes exaggerated reflexes associated with low tone?

Preserved or exaggerated reflexes associated with low tone is the hallmark of what is called central or cerebral hypotonia and the cause is an upper motor neuron lesion. The normal response to stroking the lateral aspect of the plantar surface of the foot is extension of the great toe and fanning of the other toes.

How is the knee jerk reflex related to posture?

•In order to maintain your posture (even bad posture – stop slouching) your muscles are constantly monitoring their shape. A change in shape of a muscle (the stimulus) causes the muscle to readjust its shape (the response) and maintain your posture. •The knee-jerk reflex is base on the hammer changing the shape of a muscle.

Is the reflex the same as a conscious response?

A Conscious Stimulus-Response •We react to all stimuli in basically the same way as a reflex. The integration just gets more complex. •Complex behavior involves complex integration in the brain. Making the Right Connection

Which is the simplest version of a reflex?

The simplest version is a mono-synaptic reflex that uses one sensory and one motor neuron (for example, the patellar or knee-jerk reflex). Most reflexes are polysynaptical (involving more than two neurons) and involve the activity of interneurons in the integration center.

How are reflexes mediated in the spinal cord?

In these more complicated reflexes, impulses may travel up, down, and transversely in the spinal cord. Since there is synaptical delay in neural transmission at the synapses, the more synapses there are in the reflex pathway, the more time that is required to illicit the reflex. Reflexes are mediated over simple nerve pathways called reflex arcs.

•Here is a similar reflex in the arm, showing muscle length. • The weight dropping into the hand is the stimulus. Like the hammer tapping the knee, it stretches a muscle. • The response is the muscle contracting, jerking the arm up. How the Message Travels From the Receptor to the Effector.

•In order to maintain your posture (even bad posture – stop slouching) your muscles are constantly monitoring their shape. A change in shape of a muscle (the stimulus) causes the muscle to readjust its shape (the response) and maintain your posture. •The knee-jerk reflex is base on the hammer changing the shape of a muscle.