Biology 5090 · O Level · Mammalian nervous system

Mammalian nervous system — practice question

The diagram illustrates a reflex arc. A person had an accident and injured their arm. The sensory neurones at X have been cut. Which statement describes what occurs if this person touches a hot object with their finger?

  • AThe person is not able to feel their finger touching the hot object but is able to move their finger away from the heat stimulus.
  • BThe person is not able to feel their finger touching the hot object or move their finger away from the heat stimulus.
  • CThe person can feel the heat stimulus but is not able to move their finger away from the heat stimulus.
  • DThe receptor cells in the person’s finger are not stimulated by the heat.

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