Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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4. A reflex is:
A. An information transfer way in an
organism at irritation
An information transfer way on
afferent neuron
An information transfer way on
efferent neuron
The answer of an organism to
irritation with the central nervous
B.
C.
D.
system participation
E. An information transfer from the
afferent neuron to the efferent
expand button
Transcribed Image Text:4. A reflex is: A. An information transfer way in an organism at irritation An information transfer way on afferent neuron An information transfer way on efferent neuron The answer of an organism to irritation with the central nervous B. C. D. system participation E. An information transfer from the afferent neuron to the efferent
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Step 1

In response to a stimulus, an action or a sequence which is unplanned and involuntary and nearly instantaneous movement is called as a reflex. With the help of neural pathways called as reflex arcs, a reflex is made possible which act on an impulse before it reaches the brain.
 
Elements present in the reflex are-
1. Receptor- it forms the site of stimulus action. 
2. Sensory(afferent) neuron- these neurons transmit afferent stimulus to the central nervous system. 
3. Integration center- it's formed of one or more neurons in the central nervous system. 
4. Motor(efferent) neuron- the efferent impulses from the integration center are conducted to the effector organ by them. 
5. Effector- in response to the efferent impulses, the muscle fibers or glands respond by contraction or secretion respectively. 

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