Advertisements
Advertisements
प्रश्न
What will you do if someone pricks your hand with a needle? Elucidate the pathway of response with a neat labelled diagram.
उत्तर
Reflex action and its pathway
The pathway taken by nerve impulses to accomplish reflex action is called the reflex arc.
- When the hand is pricked by a needle, the stimulus is the prick (touch) pain, which is sensed by a receptor called touch or pain receptors in the skin in our hand. This stimulus in tum triggers an impulse in a sensory neuron.
- The sensory neuron transmits or conveys the message to the spinal cord.
- The spinal cord interprets the stimulus and the impulse is passed on to the relay neuron, which in tum transmits it to a motor neuron.
- Motor neurons carry commands from the spinal cord to our arms.
- The muscle in our arm contracts and we withdraw our hand immediately from the needle prick. The muscle is the effector organ that has responded to the prick (pain).
APPEARS IN
संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the gland which is stimulated to secrete saliva.
Which of the following helps in maintaining posture and balance of the human body?
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
With the help of suitable example, describe reflex action.
Define voluntary and reflex actions. Give examples of each.
State whether the following is
The sudden application of brakes without thinking
What type of reflex is the following?
Blinking of the eye
Reflex actions are mediated through ____________.
