BI-2259
The heart
Biology · Secondary 4 · Hard · The heart
A student accidentally touches a hot metal rod and quickly pulls her hand away. Which sequence shows the correct order of events in this reflex action?
1 motor neurone carries impulses
2 receptor in skin stimulated
3 effector muscle contracts
4 sensory neurone carries impulses
A 2 → 4 → 1 → 3
B 2 → 1 → 4 → 3
C 4 → 2 → 1 → 3
D 4 → 3 → 2 → 1
1 motor neurone carries impulses
2 receptor in skin stimulated
3 effector muscle contracts
4 sensory neurone carries impulses
A 2 → 4 → 1 → 3
B 2 → 1 → 4 → 3
C 4 → 2 → 1 → 3
D 4 → 3 → 2 → 1
- A 2 → 4 → 1 → 3
- B 2 → 1 → 4 → 3
- C 4 → 2 → 1 → 3
- D 4 → 3 → 2 → 1
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