Monday, 20 May 2024

New Video Posted: Understanding Actin Filaments: Structure, Function, and Dynamics

This is the second in a series of four videos on the cytoskeleton - Understanding Actin Filaments: Structure, Function, and Dynamics.

In this video, I look at actin filaments, an essential component of the cell's cytoskeleton. 

I examine their structure, the process of filament formation, and their diverse functions in various cellular processes. I also discuss different types of actin filament structures, including contractile bundles (loose packing with myosin-II), gel-like networks (e.g., filamin), dendritic networks of branched actin molecules, and tight parallel bundles (e.g., fimbrin).

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Blog Bonus: Free information sheet summarising the video and defining the key terms - download.
 

Additional Reading

The video was produced with help from the following resources:

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Friday, 17 May 2024

New Video Posted: What is the Cytoskeleton? | Cell Biology Explained

This is the first in a series of four videos on the cytoskeleton - What is the Cytoskeleton? | Cell Biology Explained.

In this video, I introduce the cytoskeleton, a complex network of protein fibres and accessory proteins that provides essential support and strength to the cell. The cytoskeleton absorbs mechanical stress, controls cell shape and movement, enables muscle contraction, and aids in chromosome separation during mitosis and meiosis. Additionally, it helps the cell divide and provides trackways for moving molecules and vesicles.

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Blog Bonus: Free information sheet summarising the video and defining the key terms - download.
 

Additional Reading

The video was produced with help from the following resources:

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Cell Membranes - role, function and problems

I have just finished posting a series of four videos on the cell membrane:

The videos are an introduction to membranes and cover:
  • Why do cells and organelles have membranes?
  • The function of membranes in the cell
  • The structure and components of the membrane
  • The problems solved by having membranes
  • The problems caused by having membranes
  • The role of proteins in the membrane
  • How cells move material actively and passively across membranes
  • How cells move information across the membranes - the receptors
Each video comes with a free information sheet that summarises the key points in the video and defines the key terms used.

If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

 

Additional Reading

The video was produced with help from the following resources:

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New video posted: Cellular Membranes: Moving information across the membrane - the receptors

In this video, Cellular Membranes: Moving information across the membrane - the receptors, I discuss one of my favourite areas of cell biology - cell signalling.

In the video, I look at how cells receive information across their membranes and the three primary methods they use to sense external molecules and ions, from diffusion through the membrane to communication via gap junctions and interactions with specialised proteins called receptors.

The video covers various receptor types, including ion-channel linked receptors, G-protein-coupled receptors (GPCRs), and enzyme-linked receptors, explaining how each type facilitates the transmission of signals inside the cell.

This is one of four videos on membranes, the other two being:


If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Blog Bonus: Free information sheet summarising the video and defining the key terms - download.
 

Additional Reading

The video was produced with help from the following resources:

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New Video Posted: Cellular Membranes: Moving material and information across the membranes - membrane transport

In this video, Cellular Membranes: Moving material and information across the membranes - membrane transport, I look at how the cell resolves the issue of membranes preventing ions, molecules and information from entering or leaving the cell. That is, how do we transport such things across the membrane?

In this video, I examine cellular transport and how proteins facilitate the crucial exchange of molecules, ions, and information across cell membranes. The video explains both passive and active transport mechanisms and highlights the specialised roles of carrier and channel proteins in these processes.

This is one of four videos on membranes, the other two being:


If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Blog Bonus: Free information sheet summarising the video and defining the key terms - download.
 

Additional Reading

The video was produced with help from the following resources:

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New Video Posted: Cellular Membranes: The role of proteins in the membranes

In this video, Cellular Membranes: The role of proteins in the membranes, I look at the problem of getting material and information in and out of the cell and the role proteins play.

I introduce the eight ways proteins can interact with membranes: single and multiple membrane-spanning proteins, beta barrels, and proteins anchored by lipid chains or other proteins. ion transport, enzymatic reactions, and signal transduction. The video also covers the function of some protein domains (SH2 and SH3 domains, PH domains, and PTB domains) and some of the functions carried out by proteins in the membrane, such as the transport of ions, molecules and information.

This is one of four videos on membranes, the other two being:


If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Blog Bonus: Free information sheet summarising the video and defining the key terms - download.
 

Additional Reading

The video was produced with help from the following resources:

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New video posted: Cellular Membranes: Protection, Structure, and Function

In this video - Cellular Membranes: Protection, Structure, and Function, I introduce cell (biological) membranes and discuss why cells have membranes, the problems they solve and the problems they cause.

The video also looks at the structure of the plasma membrane and the membranes surrounding the organelles.

This is one of four videos on membranes, the other two being:


If you would like to support my blogging efforts, then please feel free to buy me a coffee at https://www.buymeacoffee.com/drnickm

Blog Bonus: Free information sheet summarising the video and defining the key terms - download.
 

Additional Reading

The video was produced with help from the following resources:

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