The reflex arc is the nerve pathway that the signal follows. For example, the knee jerk reflex arc has a stimulus going to an interneuron in the spine and a motor neuron completes the arc by causing the knee to jerk. A reflex is just the action itself.
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Reflex arcs are neural pathways in the body that allow for rapid, involuntary responses to a stimulus. Reflex actions are the automatic, pre-programmed responses to a particular stimulus without involving conscious thought, such as pulling your hand away from a hot object.
If you see a ball coming straight on your face, what will you do (maybe without thinking).. I guess the only thing that will automatically come in your mind is to Dodge the ball. But what if it hits your face? Your face will just become red. To summarize:
Dodging - reflex
Face becoming red - reaction
Regards:
Arvind
sometimes the involuntary response produced by central nervous system(CNS) is very quick. such a response is called reflex action. The pathway followed by the nerve impulses for producing reflex action, is called reflex arc
Yes, the peripheral nervous system (PNS) is involved in reflex actions. Reflex arcs allow sensory information to be processed in the spinal cord and produce motor responses without involving the brain. The PNS carries the sensory information to the spinal cord and the motor responses back to the muscles or glands.
Conscious actions, such as voluntary movements controlled by the brain, are not reflex actions in humans. These actions involve decision-making and higher brain functions, unlike reflex actions which are automatic responses to stimuli.
Reflex arcs are nerve pathways that produce responses without involving the brain. These reflex actions are quickly generated in response to a stimulus and help protect the body from harm or injury. The signal travels from the sensory neuron to the spinal cord and back out through the motor neuron to produce a rapid response.
A reflex action is an action that happens almost instantly without conscious thought. Grasp a very hot handle of a saucepan on the stove, and you immediately release the handle to avoid further burning by reflex action.
The brain is not one of the essential components of a reflex arc. Reflex arcs involve sensory receptors, afferent neurons, interneurons, efferent neurons, and effectors, but they do not involve the brain in the reflex loop.