instruction:
You are given a sentence and your task is to generate another sentence that supports the given input.
question:
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.
answer:
An electrical signal along a nerve cell triggers the secretion of neurotransmitter molecules.


question:
At lease five times in the history of life on earth mass extinction event s have occurred.
answer:
Five mass distinctions have radically altered the history of life.


question:
Mass on a Vertical Spring When simple harmonic motion is discussed in introductory textbooks, the mass connected to the spring usually slides on a frictionless horizontal surface.
answer:

An object attached to a spring sliding on a frictionless surface is an uncomplicated type of simple harmonic oscillator.