Biology 9700 · AS & A Level · Fluid mosaic membranes

Fluid mosaic membranes — practice question

Myasthenia gravis is a condition caused by the immune system being unable to tell self from non-self. Antibodies attach to a component of the junctions between a muscle and its nerve. What is the correct description of Myasthenia gravis?

  • AImpulses in the nerve to the affected muscle cannot be blocked.
  • BThe affected muscle cannot be repeatedly stimulated.
  • CThe affected muscle is permanently stimulated.
  • DThe nerve to the affected muscle does not carry any nerve impulses.

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