TASK DEFINITION: You are given a sentence and your task is to generate another sentence that supports the given input.
PROBLEM: Nerve cells transmit a signal when one cell releases a store of neurotransmitter and the next cell in the chain receives it, activating a membrane signal pathway that in turn generates an electrical signal.

SOLUTION: An electrical signal along a nerve cell triggers the secretion of neurotransmitter molecules.

PROBLEM: There are six different types of simple machines.

SOLUTION: There are six types types of simple machines.

PROBLEM: BACKGROUND INFORMATION A Pedigree chart is a device used to trace genetic traits through a number of generations.

SOLUTION:
The pedigree chart model can be used to trace genetic inheritance.