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.

Q: Question: When substances pass through the cell membrane without needing any energy what is it called? Answer: passive transport

A: When substances pass through the cell membrane without needing any energy, it is called passive transport.
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Q: Question: What do you call the movement of molecules across a membrane without the input of energy? Answer: passive transport

A: You call the movement of molecules across a membrane without the input of energy passive transport.
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Q: Question: What cells secrete signaling molecules that promote sperm production and can control whether germ cells live or die? Answer: sertoli cells

A:
Sertoli cells cells secrete signaling molecules that promote sperm production and can control whether germ cells live or die.
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