Learn: Cell Biology

Welcome!Today we'll learn about Cell Biology. This topic helps us understand the structure, function, and processes of cells, which are the building blocks of life.

What are cells?Cells are the basic units of life. All living organisms are made of cells, which carry out essential functions to keep them alive, such as energy production and reproduction.

MicroscopyMicroscopes are used to magnify objects that are too small to see with the naked eye. They allow us to study cell structures in detail. There are two main types: light microscopes (use light to magnify) and electron microscopes (use electrons for greater detail).

Cell structureCells have different parts, each with specific functions. Key structures include:Nucleus: Contains genetic material and controls cell activities.Cytoplasm: Jelly-like substance where chemical reactions occur.Cell membrane: Controls what enters and leaves the cell.Mitochondria: Produces energy through respiration.Ribosomes: Synthesise proteins.

Cell division: MitosisMitosis is how cells divide to produce identical daughter cells. It is crucial for growth, repair, and reproduction in multicellular organisms. The process involves stages such as prophase, metaphase, anaphase, and telophase.

Transport in cellsCells move substances in and out using:Diffusion: Movement of particles from high to low concentration.Osmosis: Movement of water across a semi-permeable membrane.Active transport: Movement of substances against a concentration gradient, requiring energy.

Review Time!Great work! You've learned about cell structure, microscopy, cell division, and transport mechanisms. Now let's test your understanding with a few questions.