Difference Between Reaction and Reflex

Thekeydifferencebetween reaction and reflex depends on the type of response.A reaction isa voluntary response while a reflex is an involuntary response.

人类nervous systemcomprises of two major divisions;central nervous system (CNS) and peripheral nervous system (PNS). CNS comprises two components; namely, the spinal cord and the brain. PNS comprises of everything else other than the CNS. Both CNS and PNS involve in maintaining body homeostasis by responding to many stimuli generated from the environment through reflexes and reactions. Sensory organs andsensory neuronssense the signals generated from stimuli. Then, themotor neuronsand effector organs generate actions accordingly. Therefore, the total nervous system functions with reactions and reflexes generated in response to stimuli.

内容

1.Overview and Key Difference
2.What is a Reaction
3.What is a Reflex
4.Similarities Between Reaction and Reflex
5.并排比较 - 反应与反射形式
6。概括

什么是反应？

In the context of physiology, a stimulus is a detectable change that occurs in the internal or external environments. The reaction or response is the ability of an organism to identify the stimulus and react accordingly. Hence, for a reaction to occur, the stimulus moves along the CNS through sensory organ, sensory neuron, brain, effector neuron and organ.

A reaction is a voluntary process that requires a conscious thought in responding to a stimulus. In comparison to a reflex, a reaction is a much slower process since the information received by the stimulus travels up to the brain and then to the effector organs to carry out the response. In other words, during a normal reaction, the sensory nerves carry the information from the sensory organs to the brain which perceives and organizes a signal and transfers to the motor neuron to carry the information to effector organs. Then the effector organ acts according to the information given by the motor neuron.

For example, the voluntary reactions are carried out when an organism feel cold; the sensory nerves will sense it and send the information to the brain. The brain will inform relevant effector organs such as skeletal muscles to contract and generate heat accordingly.

什么是反射？

A reflex is an instantaneous movement that occurs involuntarily in response to a stimulus. This process also terms as reflex action that is facilitated by reflex arcs; the neural pathways present in living organisms. Thus, these reflex arcs have the ability to act on an impulse instantaneously without sending stimulus information to the brain. Accordingly, it is an automatic response that does not require any conscious thought in responding to the stimulus. For example, the immediate withdrawal of the foot in stepping on a nail is due to a reflex not due to a reaction. Consequently, reflex minimizes the physical harm since it is more instantaneous and faster than a reaction.

反射弧由五个不同的组件组成。其中包括感官神经元（沿传出途径的神经冲动），整合中心（由CNS中存在的一个或多个突触组成），运动神经元（进行神经元）（导致神经脉冲，进行神经脉冲，沿着从中枢神经系统 /积分中心到效应器器官的传出途径（对传出神经冲动的反应）。反射的最低要求是两个神经元。感官和运动神经元。

What are the Similarities Between Reaction and Reflex?

• 反应和反射涉及刺激。
• 在两种类型中，感觉神经元的存在是强制性的。
• 同时,他们涉及到神经系统。
• Besides, both in the maintenance of the body homeostasis.

What is the Difference Between Reaction and Reflex?

Reaction and reflex are two pathways that our nervous system executes in response to stimuli. The reaction is comparatively a slow action that goes via the brain. But, the reflex is a fast action that does not involve the brain. Thus, this is a key difference between reaction and reflex. Furthermore, compared to a reaction, the reflex is an instantaneous action which minimizes the harm.

此外，反应是自愿反应，而反射是非自愿响应。因此，这是反应和反射之间的另一个区别。以下信息图显示了有关反应和反射之间差异的更多详细信息。

概括– Reaction vs Reflex

反应和反射是对外部和内部产生的可检测刺激做出反应的两种方法。反射是一个非自愿进行的瞬时过程。相比之下，反应是一个缓慢的自愿过程。在反应过程中，来自刺激的信息到达大脑，但是在反射期间，它没有。因此，这是反应和反射之间的关键区别。但是，这两个过程对于维持身体稳态都很重要。

Reference:

1.Phillips, Harry. “How Does the Body Respond to Touching Something Hot?” Health24, 24 Nov. 2014.Available here
2.“Stimulus-Response Theory.” Encyclopædia Britannica, Encyclopædia Britannica, Inc.Available here

Image Courtesy:

1. jdifoolderivativative工作的“神经系统组织EN”：LOOIE496（谈话）(CC BY-SA 3.0)viaCommons Wikimedia
2.”Anatomy and physiology of animals A reflex arc”By By Ruth Lawson Otago Polytechnic(CC BY 3.0)viaCommons Wikimedia