Biology 9700 · AS & A Level · Movement into and out of cells

Movement into and out of cells — practice question

Batrachotoxin is a poison present in frogs from the Colombian jungle. It is used to make poison darts. The poison acts by increasing the permeability of the cell surface membrane of nerve and muscle cells to sodium ions, causing them to move out of the cells. Four students made comments about the effect of the poison on the cells. Which comments are correct for the cells affected by batrachotoxin?

  • A1 and 3
  • B1 and 4
  • C2 and 3
  • D2 and 4

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI