Reflex Arc (AQA A-Level Biology): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of response does a reflex arc produce?
What type of response does a reflex arc produce?
Involuntary response
How many neurones are typically involved in a reflex arc?
How many neurones are typically involved in a reflex arc?
Three neurones
Where do most reflex arcs occur?
Where do most reflex arcs occur?
In the spinal cord
What is the second stage in a reflex arc?
What is the second stage in a reflex arc?
Receptor
What does the sensory neurone do in a reflex arc?
What does the sensory neurone do in a reflex arc?
Carries impulses to spinal cord
Where is the intermediate neurone located?
Where is the intermediate neurone located?
In the spinal cord
Why are reflex pathways extremely fast?
Why are reflex pathways extremely fast?
They involve few synapses
How long does a typical reflex response take?
How long does a typical reflex response take?
50-100 milliseconds
When do reflexes start working effectively?
When do reflexes start working effectively?
From birth
Can the brain override reflexes?
Can the brain override reflexes?
Yes, if necessary