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A&P Chapter 3
Question | Answer |
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What is the difference between a prokaryote and a eukaryote? | Eukaryotic cells contain membrane-bound organelles, including a nucleus. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelles. |
Name three structures that all mammalian cells possess. | the cell membrane, the cytoplasm, and the nucleus. |
Be able to describe key components of the lipid bilayer of the cell membrane. Which part is hydrophobic and which part is hydrophilic? | The side of the lipid bilayer facing the outside of the cell is hydrophilic and the side facing the inside of the cell is hydrophobic. |
What types of protein are found in the cell membrane? | The cell membrane contains structural and globular proteins. Globular proteins include integral and peripheral proteins. |
What is the glycocalyx? | the outer covering of the cell that not only aids in cell adhesion but also allows the cell to be identified by other cells. |
Which are found more commonly in mammalian cells: cilia or flagella? | Cilia |
What are the four principal components of cytoplasm? | Cytosol, cytoskeleton, organelles, and inclusions |
What is cytosol and what kind of molecules are found in it? | Cytosol is the fluid of the cell. It is a viscous, semitransparent liquid composed of dissolved electrolytes, amino acids, and simple sugars. Proteins are also suspended in the cytosol and give it its thick, jellylike consistency. |
What is the cytoskeleton and what is its function? | a 3-dimensional frame for the cell. Function: it gives support and shape to the cell, enables it to move, provides direction for metabolic activity, and anchors the organelles |
Why do inclusions vary in appearance? What function do they perform? | The appearance of inclusions varies depending on what they contain and whether or not they have an envelope. They store substances the cell eventually uses. |
Can a cell that does not contain a nucleus live as long as a cell that does contain one? Why or why not? | No, because the cell cannot repair itself, divide, or make proteins or enzymes without a nucleus. |