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Reflex arcs and reaction times

10th grade (Year 11 in England) · 10 questions · Common Core: NGSS.HS-LS1-2, NGSS.SEP 3 · England: GCSE Combined Science: Homeostasis and response, GCSE Combined Science: required practical (reaction time)

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  1. Question 1

    In a ruler-drop test, a student's reaction times were 0.25 s, 0.2 s, 0.22 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  2. Question 2

    A student's reaction time is longer after staying up late. This shows reaction time can be affected by…

    • A. eye colour
    • B. tiredness
    • C. shoe size
    • D. blood group

  3. Question 3

    In a ruler-drop test, a student's reaction times were 0.19 s, 0.24 s, 0.23 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  4. Question 4

    Which part of a reflex arc is the effector when you blink at a bright flash?

    • A. the muscles of the eyelid
    • B. the optic nerve
    • C. the retina
    • D. the spinal cord

  5. Question 5

    In a ruler-drop test, a student's reaction times were 0.24 s, 0.25 s, 0.25 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  6. Question 6

    A student's reaction time is longer after staying up late. This shows reaction time can be affected by…

    • A. eye colour
    • B. tiredness
    • C. blood group
    • D. shoe size

  7. Question 7

    In a ruler-drop test, a student's reaction times were 0.25 s, 0.23 s, 0.26 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  8. Question 8

    How does a signal cross a synapse (the gap between neurones)?

    • A. The neurones touch and fuse
    • B. Chemicals diffuse across the gap
    • C. An electric spark jumps across
    • D. Blood carries it

  9. Question 9

    In a ruler-drop test, a student's reaction times were 0.18 s, 0.19 s, 0.25 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  10. Question 10

    How does a signal cross a synapse (the gap between neurones)?

    • A. The neurones touch and fuse
    • B. An electric spark jumps across
    • C. Blood carries it
    • D. Chemicals diffuse across the gap

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Answer key: Reflex arcs and reaction times

  1. 1. 0.22 s

  2. 2. B. tiredness

  3. 3. 0.22 s

  4. 4. A. the muscles of the eyelid

  5. 5. 0.25 s

  6. 6. B. tiredness

  7. 7. 0.25 s

  8. 8. B. Chemicals diffuse across the gap

  9. 9. 0.21 s

  10. 10. D. Chemicals diffuse across the gap