Drugs can affect a person’s nervous system - Edexcel - GCSE Biology - Question 6 - 2012 - Paper 1
Question 6
Drugs can affect a person’s nervous system.
(a) Complete the sentence by putting a cross (X) in the box next to your answer.
Alcohol is classed as a
A
☐ depress... show full transcript
Worked Solution & Example Answer:Drugs can affect a person’s nervous system - Edexcel - GCSE Biology - Question 6 - 2012 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
Alcohol is classed as a depressant. This option is selected as alcohol slows down brain function and decreases the rate of neural activity.
Step 2
State the effect alcohol has on the time taken to respond to a stimulus.
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Answer
Alcohol decreases the time taken to respond to a stimulus, as it impairs cognitive functions and slows down reflexes.
Step 3
Suggest two long-term effects of alcoholism in the human body.
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Answer
Liver damage, which can lead to cirrhosis.
Increased risk of mental health issues such as depression and anxiety.
Step 4
Describe the effects of caffeine on the nervous system.
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Answer
Caffeine acts as a stimulant, increasing alertness and reducing fatigue by blocking adenosine receptors. This leads to enhanced concentration and energy levels, but may also cause increased heart rate and anxiety in some individuals.
