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Reflex arcs and reaction times

10th grade (Year 11 in England) · 11 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

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

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

  2. Question 2

    In a ruler-drop test, a student's reaction times were 0.2 s, 0.19 s, 0.2 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  3. Question 3

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

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

  4. Question 4

    In a ruler-drop test, a student's reaction times were 0.25 s, 0.21 s, 0.22 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  5. Question 5

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

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

  6. Question 6

    In a ruler-drop test, a student's reaction times were 0.19 s, 0.18 s, 0.24 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  7. Question 7

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

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

  8. Question 8

    In a ruler-drop test, a student's reaction times were 0.23 s, 0.24 s, 0.22 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  9. Question 9

    Why are reflexes faster than voluntary actions?

    • A. Reflex neurones are longer
    • B. The signal does not need to go through the conscious part of the brain
    • C. Reflexes use hormones
    • D. Reflexes use the digestive system

  10. Question 10

    In a ruler-drop test, a student's reaction times were 0.18 s, 0.24 s, 0.24 s. What is the mean reaction time, in s? Give 2 decimal places.

    Answers

  11. Question 11

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

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

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  1. Chemicals diffuse across the gap
  2. 0.2 s
  3. tiredness
  4. 0.23 s
  5. the muscles of the eyelid
  6. 0.2 s
  7. Chemicals diffuse across the gap
  8. 0.23 s
  9. The signal does not need to go through the conscious part of the brain
  10. 0.22 s
  11. Chemicals diffuse across the gap