Peripheral Protein: Definition, Membrane Binding, Functions, and Examples
Learn what peripheral proteins are, how they attach to cell membranes, their major functions and examples, and how they differ from integral proteins.
Channel Protein: Structure, Types, Mechanism, and Functions
Learn what a channel protein is, how its selective pore enables membrane transport, major channel types, their functions, and how channels differ from carriers.
Cytoskeleton: Structure, Components and Functions
Learn how the cytoskeleton is built from actin filaments, intermediate filaments, and microtubules and how it controls cell shape, transport, movement, and division.
Microtubules – Definition, Structure, Functions
Learn what microtubules are, how α- and β-tubulin form their structure, why they grow and shrink, and how they support transport, mitosis, cilia, and cell organization.
Intermediate Filaments – Definition, Structure, Function
Learn how intermediate filaments are built, why they are non-polar, where keratins, vimentin, neurofilaments and lamins occur, and how they support cell and tissue strength.
Microfilaments: Definition, Structure, Functions & Formation
Microfilaments are thin actin filaments of the cytoskeleton. Explore their structure, polarity, dynamics, functions, locations and differences from other cytoskeletal filaments.
Mitochondria: Structure, Functions, DNA, Dynamics and Biological Significance
Learn what mitochondria are, how their membranes and cristae support ATP production, and how mtDNA, dynamics and other functions contribute to cell biology.
Microbodies: Definition, Structure, Types and Functions
Microbodies are small, single-membrane organelles found in eukaryotic cells that compartmentalize specialized metabolic reactions. The term is most closely associated with peroxisomes and specialized peroxisomal forms such as glyoxysomes, glycosomes, and Woronin bodies. Depending on the organism and cell type, these organelles participate in fatty-acid metabolism, hydrogen peroxide handling, photorespiration, the glyoxylate pathway, compartmentalized glycolysis, … Read more
Mesenchymal Stromal Cells (MSCs): Definition, Characteristics, Sources, Functions and Uses
Learn what mesenchymal stromal cells (MSCs) are, their markers, sources, differentiation, immune functions, mechanisms, clinical uses and limitations.
Transitional Epithelium – Definition, Structure, Function and Location
The epithelium of transition is a form of stratified epithelium that comprises several layers of cells, where their shape cells changes in accordance with the function that the organ performs. The epithelium can have a varied appearance, as it appears to be circular or cubic in a relaxed state with the exception of the apical layer that appears flat when stretched. The epithelium is essentially restricted to the urinary system that’s why it’s sometimes referred to”urothelium” “urothelium”.