The Human Nervous System (AQA GCSE Biology): Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
What is reaction time?
What is reaction time?
How quickly nervous system responds to a stimulus
Most common method for measuring reaction times
Most common method for measuring reaction times
Ruler drop test
Which hand to use in ruler drop test
Which hand to use in ruler drop test
Weaker hand (left if right-handed)
Where to focus during ruler drop test
Where to focus during ruler drop test
Across the lab, not at the ruler
Starting position of ruler (mark aligns with thumb)
Starting position of ruler (mark aligns with thumb)
0cm mark lines up with top of thumb
Formula for reaction time from distance fallen
Formula for reaction time from distance fallen
Why square root in reaction time formula
Why square root in reaction time formula
From physics equations about falling objects under constant accel
Significant figures for reaction time answer
Significant figures for reaction time answer
2 significant figures
Effect of practice on reaction times
Effect of practice on reaction times
Reaction times often get faster
What happens to improvement after several attempts
What happens to improvement after several attempts
Improvement usually levels off
Why avoid practice runs before investigation
Why avoid practice runs before investigation
Practice is the variable being measured
Vertical axis label for reaction time bar chart
Vertical axis label for reaction time bar chart
Reaction time
After how many trials does performance stabilize
After how many trials does performance stabilize
After 3-4 trials
Ruler falls at constant acceleration due to what
Ruler falls at constant acceleration due to what
Gravity