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NAS > Simple reflexes > Flashcards

Simple reflexes Flashcards

1
Q

What three things is a reflex?

A

stereotyped
involuntary
rapid

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2
Q

What are the three general functions of reflexes?

A

protective
postural
homeostasis

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3
Q

What are the 5 neural components of a reflex?

A 
receptor
afferents
CNS
efferents
effector
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4
Q

What is involved in a myotatic reflex?

A 
muscle spindle
afferent
N-Ns synapse in CNS (excitatory NT)
efferent
muscle contracts
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5
Q

What is invloved in a reverse myotatic reflex?

What is it’s functions?

A 
golgi tendon organ
afferent
interneurone in CNS 
excitatory NT then inhibitory NT
efferent
muscle relaxes
Opposite response to muscle spindle, release mechanism, prevents tension ripping off bone
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6
Q

What is involved in the crossed extensor reflex?

What is it’s function?

A

both inhibition and excitation, also neurone up to brain

lifts one leg up, shifts weight onto other leg

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NAS (21 decks)

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