What is the role of spinal cord in reflex action
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What is the role of Spinal Cord in reflex action?
Nervous Coordination...Serious answers please!!!!!
Answered by admin @
Answer:
Reflex actions
There are three main types of neuron: sensory, motor and relay.
These different types of neurons work together in a 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.
A reflex action follows this general sequence and does not involve the conscious part of the brain. This is why the response is so fast.
Neurones work together to make a reflex action
Reflex arcs
The nerve pathway followed by a reflex action is called a reflex arc. For example, a simple reflex arc happens if we accidentally touch something hot.
The nerve pathway in the arm
Receptor in the skin detects a stimulus (the change in temperature).
Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS. Relay neurons connect sensory neurons to motor neurons.
Motor neuron sends electrical impulses to an effector.
Effector produces a response (muscle contracts to move hand away).
Organisms are able to modify a reflex action and overcome it, but this uses the brain and has to be learnt. For example, keeping hold of a hot object requires a nerve impulse to be sent to the motor neuron of the reflex arc to interfere with the normal reflex action to drop the object.
Explanation:
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