West Virginia Barber Written Practice Exam

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Prepare for the West Virginia Barber Written Exam with flashcards and multiple choice questions. Each question includes helpful hints and explanations. Ensure your success on the exam!

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What allows a soluble substance to enter and leave the cell?

Cell membrane
Cytoplasm
Nucleus
Ribosome

The correct answer is: Cell membrane

The correct answer is the cell membrane. The cell membrane plays a crucial role in controlling what substances can enter and leave the cell. It is selectively permeable, meaning it only allows certain molecules to pass through while blocking others. This selective barrier helps maintain the cell's internal environment and allows for necessary interactions with the external environment. The cytoplasm, nucleus, and ribosome do not directly regulate the movement of substances in and out of the cell like the cell membrane does.