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4: Cell Structure

Last updated

Mar 6, 2021
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- 3.14: Nucleic Acids - Types of RNA
- 4.1: Studying Cells - Cells as the Basic Unit of Life

Boundless
Boundless

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4.1: Studying Cells - Cells as the Basic Unit of Life
A cell is the smallest unit of a living thing and is the basic building block of all organisms.
4.2: Studying Cells - Microscopy
Microscopes allow for magnification and visualization of cells and cellular components that cannot be seen with the naked eye.
4.3: Studying Cells - Cell Theory
Cell theory states that living things are composed of one or more cells, that the cell is the basic unit of life, and that cells arise from existing cells.
4.4: Studying Cells - Cell Size
Cell size is limited in accordance with the ratio of cell surface area to volume.
4.5: Prokaryotic Cells - Characteristics of Prokaryotic Cells
A prokaryote is a simple, unicellular organism that lacks an organized nucleus or other membrane-bound organelle.
4.6: Eukaryotic Cells - Characteristics of Eukaryotic Cells
A eukaryotic cell has a true membrane-bound nucleus and has other membranous organelles that allow for compartmentalization of functions.
4.7: Eukaryotic Cells - The Plasma Membrane and the Cytoplasm
The plasma membrane is made up of a phospholipid bilayer that regulates the concentration of substances that can permeate a cell.
4.8: Eukaryotic Cells - The Nucleus and Ribosomes
Found within eukaryotic cells, the nucleus contains the genetic material that determines the entire structure and function of that cell.
4.9: Eukaryotic Cells - Mitochondria
Mitochondria are organelles that are responsible for making adenosine triphosphate (ATP), the cell’s main energy-carrying molecule.
4.10: Eukaryotic Cells - Comparing Plant and Animal Cells
Although they are both eukaryotic cells, there are unique structural differences between animal and plant cells.
4.11: The Endomembrane System and Proteins - Vesicles and Vacuoles
Vesicles and vacuoles are membrane-bound sacs that function in storage and transport.
4.12: The Endomembrane System and Proteins - The Endoplasmic Reticulum
The endoplasmic reticulum is an organelle that is responsible for the synthesis of lipids and the modification of proteins.
4.13: The Endomembrane System and Proteins - The Golgi Apparatus
The Golgi apparatus sorts and packages materials before they leave the cell to ensure they arrive at the proper destination.
4.14: The Endomembrane System and Proteins - Lysosomes
Lysosomes are organelles that digest macromolecules, repair cell membranes, and respond to foreign substances entering the cell.
4.15: The Endomembrane System and Proteins - Peroxisomes
Peroxisomes neutralize harmful toxins and carry out lipid metabolism and oxidation reactions that break down fatty acids and amino acids.
4.16: The Cytoskeleton - Microfilaments
Microfilaments, which are the thinnest part of the cytoskeleton, are used to give shape to the cell and support all of its internal parts.
4.17: The Cytoskeleton - Intermediate Filaments and Microtubules
Microtubules are part of the cell’s cytoskeleton, helping the cell resist compression, move vesicles, and separate chromosomes at mitosis.
4.18: Connections between Cells and Cellular Activities - Extracellular Matrix of Animal Cells
The extracellular matrix of animal cells holds cells together to form a tissue and allow tissues to communicate with each other.
4.19: Connections between Cells and Cellular Activities - Intercellular Junctions
Intercellular junctions provide plant and animal cells with the ability to communicate through direct contact.

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