In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: How do heavy alkanes affect the skin? Answer: form a protective layer
Form a protective layer do heavy alkanes affect the skin.

Question: What system consists of neurons that carry signals to skeletal muscles? Answer: motor system
The motor system consists of neurons that carry signals to skeletal muscles.

Question: How many valence electrons does nitrogen have? Answer: 5

Nitrogen has 5 valence electrons.