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反射

File:Improved_General_Reflex_Diagram.png · Wikimedia Commons · See Wikimedia Commons

EntityQ179405· pop 71· linked from 495 articles

Also known as GO:0060004, reflex or spinal reflex, reflex action, involuntary action

In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action and nearly instantaneous response to a stimulus. thumb|429x429px|The simplest reflex is initiated by a stimulus, which activates an afferent nerve. The signal is then passed to a response neuron, which generates a response. Reflexes are found with varying levels of complexity in organisms with a nervous system. A reflex occurs via neural pathways in the nervous system called reflex arcs. A stimulus initiates a neural signal, which is carried to a synapse. The signal is then transferred across the synapse to

AI overview

A reflex is an automatic, nearly instantaneous response to a stimulus that your body produces without you having to think about it, controlled by your nervous system. Reflexes matter because they allow organisms to respond quickly to potentially dangerous situations or stimuli through direct neural pathways called reflex arcs, without waiting for conscious deliberation.

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Wikidata facts

Subclass of
motor control
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Commons category
Reflexes
topic's main category
Category:Reflexes
topic has template
Template:Reflex
NCI Thesaurus ID
C78342
on focus list of Wikimedia project
Wikipedia:Vital articles/Level/4
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Article · 日本語

生物学で言う反射(はんしゃ、英: reflex or spinal reflex)とは、動物の生理作用のうち、特定の刺激に対する反応として意識される事なく起こるものを指す。普通、反射という言葉を使う対象は意識の存在が(曖昧にではあっても)確かめられる脊椎動物に限られる。たとえば昆虫が光に集まる、ゾウリムシが水面近くに集まるというような走性は反射と呼ばない。ヒトの反射でもっともよく知られたものに、膝蓋腱を叩くと下腿が跳ね上がる膝蓋腱反射、屈筋反射がある。条件反射は定義によっては反射に含まれるが、ここでは扱わない。

Abstract from DBpedia / Wikipedia · CC BY-SA

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