10 questions🇬🇧English
⚡ The Nervous System & Reflexes – GCSE
Biology · GCSE — neurones, synapses, the reflex arc and reaction times
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Questions
Which two parts make up the central nervous system (CNS)?
The brain and the spinal cord
The brain and the sense organs
The brain and the nerves
The spinal cord and the heart
20s
Which type of neurone carries impulses from receptors to the central nervous system?
Sensory neurone
Spinal neurone
Relay neurone
Motor neurone
20s
Which of these is an example of an effector?
A light receptor in the eye
The spinal cord
A muscle
A sensory neurone
20s
Which order shows the correct pathway of an impulse in a reflex arc?
Receptor → motor → relay → sensory → effector
Receptor → sensory → relay → motor → effector
Receptor → relay → sensory → motor → effector
Effector → sensory → relay → motor → receptor
30s
How is a nerve impulse passed from one neurone to the next across a synapse?
A chemical diffuses across the gap
The impulse is carried by the blood
An electrical impulse jumps the gap
The two neurones touch and join up
30s
Why are reflex actions so fast?
They use only one neurone
They bypass the conscious part of the brain
Their impulses do not cross any synapses
The impulses travel through the blood
30s
Which of these is an example of a reflex action?
Choosing what to eat for lunch
The pupil getting smaller in bright light
Typing a message on a phone
Catching a ball thrown to you
30s
In a ruler drop test, Sam catches the ruler after it falls 22 cm and Ali after 9 cm. What does this show?
Both have the same reaction time
Sam has the faster reaction time
The ruler fell more slowly for Ali
Ali has the faster reaction time
30s
A student uses the ruler drop test to see if caffeine affects reaction time. Which of these is a control variable?
The distance the ruler falls
The amount of caffeine drunk
Using the same hand each time
The reaction time of the person
30s
A drug blocks the receptors on the neurone after a synapse. What is the most likely effect?
The impulse is not passed to the next neurone
More neurotransmitter crosses the gap
The impulse travels faster across the gap
The impulse goes back along the first neurone
30s