Name parts P and Q shown on Figure 3 - AQA - GCSE Biology Combined Science - Question 4 - 2018 - Paper 2
Question 4
Name parts P and Q shown on Figure 3.
P
Q
Compare how information is transferred along a neurone with how information is transferred across gap P.
Why does a cons... show full transcript
Worked Solution & Example Answer:Name parts P and Q shown on Figure 3 - AQA - GCSE Biology Combined Science - Question 4 - 2018 - Paper 2
Step 1
P
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Answer
synapse
Step 2
Q
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Answer
relay neurone
Step 3
Compare how information is transferred along a neurone with how information is transferred across gap P.
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Answer
Information is transferred along a neurone as an electrical impulse, whereas across gap P (the synapse), it is transferred via diffusion of chemicals or neurotransmitters.
Step 4
Why does a conscious action take longer than a reflex action?
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Answer
A conscious action takes longer because the impulse has to travel to the brain and back and includes processing time. In contrast, reflex actions are quicker as they involve a direct pathway.
Step 5
Calculate the time it would take for the information to travel 1.6 m along a neurone.
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To calculate time, use the formula:
ext{Time} = rac{ ext{Distance}}{ ext{Speed}}
Substituting the values:
ext{Time} = rac{1.6 ext{ m}}{120 ext{ m/s}} = 0.0133... ext{ s}
Converting to milliseconds:
0.0133extsimes1000=13.3extms
Therefore, Time = 13.3 ms.
Step 6
Describe the relationship between age in years and time for the muscle to contract.
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Answer
As age in years increases, the time for muscle contraction also increases. This suggests a correlation between age and the response time of the nervous system.
