Questions and Answers
What are the two major parts of a typical cell?
What separates the nucleus from the cytoplasm?
Which of the following substances is NOT a component of protoplasm?
What is the principal fluid medium of the cell?
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Where do chemical reactions take place within the cell?
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What separates the cytoplasm from the surrounding fluids?
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In what concentration is water present in most cells?
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What is the term for the different substances that make up the cell?
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Which part of a typical cell is separated from the cytoplasm by a nuclear membrane?
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In what concentration is water present in most cells, except for fat cells?
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Which component of protoplasm is mainly responsible for the principal fluid medium of the cell?
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Where do chemical reactions mainly take place within a cell?
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Which part of a cell is also known as the plasma membrane?
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Study Notes
Cell Structure
- A typical cell has two major parts: the nucleus and the cytoplasm.
- The nucleus is separated from the cytoplasm by a nuclear membrane.
- The cytoplasm is separated from the surrounding fluids by a cell membrane (also called the plasma membrane).
Composition of Protoplasm
- Protoplasm is the collective term for the substances that make up the cell.
- Protoplasm is composed mainly of five basic substances: water, electrolytes, proteins, lipids, and carbohydrates.
Properties of Water in Cells
- Water is the principal fluid medium of the cell.
- Water is present in most cells, except for fat cells, in a concentration of 70 to 85 percent.
- Many cellular chemicals are dissolved in the water.
- Others are suspended in the water as solid particulates.
- Chemical reactions occur among the dissolved chemicals or at the surfaces of the suspended particles or membranes.
Cell Survival
- Each of the 100 trillion cells in a human being is a living structure that can survive for months or many years.
- Cell survival depends on the surrounding fluids containing appropriate nutrients.
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Description
Explore the basic organization of a human cell and the functions of its component parts. Learn about the major parts such as the nucleus and other structures through this quiz.
