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Related Concept Videos

What are Cells?01:07

What are Cells?

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Cells are the smallest and basic units of life, whether it is a single cell that forms the entire organism, e.g., in a bacterium or trillions of them, e.g., in humans. No matter what organism a cell is a part of, they share specific characteristics.
Basic Characteristics of Cells
A living cell has a plasma membrane, a bilayer of lipids that separates the aqueous solution inside the cell called the cytoplasm from the outside environment.
Furthermore, a living cell possesses genetic information...
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What is Cell Signaling?02:03

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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
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A concentration cell is a type of a  voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
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Chemistry of the Cell02:58

Chemistry of the Cell

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The cell is chemically composed of water, organic molecules and inorganic ions.
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The polarity of the water molecule and its resulting hydrogen bonding makes water a unique substance with special properties that are intimately tied to the processes of life. Life originally evolved in an aqueous environment, and most of an organism’s cellular chemistry and metabolism occur inside the aqueous contents of the cell’s cytoplasm. Special properties of water are its high heat capacity...
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Hair Cells01:22

Hair Cells

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Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
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Cell Size

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Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
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Workshop on Germ Cells.

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Zebrafish embryos offer a powerful in vivo system for studying vertebrate germ cells, overcoming previous research challenges. This model system has advanced our understanding of germ cell migration and other key aspects of germ cell biology.

Keywords:
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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Genetics

Background:

  • Vertebrate germ cell research has historically faced significant technical hurdles.
  • The zebrafish model system has emerged as a powerful tool for in vivo germ cell analysis.
  • Early research focused on germ cell migration, leveraging the transparency of zebrafish embryos.

Purpose of the Study:

  • To highlight the advancements in studying germ cells using the zebrafish model.
  • To showcase the expanding scope of teleost germ cell research beyond migration.
  • To underscore the growing importance of zebrafish in germ cell biology.

Main Methods:

  • In vivo imaging and analysis of zebrafish embryos.
  • Genetic manipulation of zebrafish to study germ cell development.
  • Comparative analysis across different teleost species.

Main Results:

  • Zebrafish embryos provide unprecedented opportunities for visualizing and manipulating germ cells in vivo.
  • Germ cell migration in zebrafish has been extensively characterized.
  • Research has expanded to encompass broader aspects of teleost germ cell biology.

Conclusions:

  • The zebrafish system is instrumental in overcoming challenges in vertebrate germ cell research.
  • Ongoing research continues to expand our knowledge of germ cell development and function in teleosts.
  • The zebrafish model is crucial for future discoveries in reproductive biology and developmental genetics.