Epithelial tissues cover body surfaces, line cavities and form glands. They function in protection, secretion, absorption, and transportation. Epithelial tissues are classified based on the number of cell layers and cell shape Simple Epithelium tissue Single layers of cells primarily functions in absorption, secretion, and filtration. Types Simple Squamous Epithelium Structure: Single layer of flat … Read more

Intracellular signalling refers to the communication between cells using signalling molecules and cellular pathways. These signals allow cells to respond to their environment and coordinate their functions. There are several forms of intracellular signalling, which can be classified based on the mode of signal transmission: Contact-dependent signalling In this form of signalling, the signalling molecule … Read more

Intracellular signalling pathways are activated by extracellular signal molecules, which allow cells to respond and adapt to changes in their environment. The process of activating an intracellular signalling pathway typically involves the following steps: Signal Generation A signalling molecule (ligand) is produced and released by a signalling cell in response to a specific stimulus. Signal … Read more

Cell communication is a vital process in multicellular organisms that allows cells to coordinate their activities, respond to changes in their environment, and maintain homeostasis. The general principles of cell communication can be summarized in the following step Signal generation In response to a stimulus, a signalling molecule or ligand is produced and released by … Read more

Cell junctions are specialized structures that connect cells to each other or to the extracellular matrix. These junctions play crucial roles in maintaining the integrity and function of tissues by allowing communication between cells, holding cells together, and regulating the passage of molecules between them. There are three main types of cell junctions: Tight Junctions … Read more

Cell division is a fundamental process in which a parent cell divides into two or more daughter cells. It allows for growth, repair, and reproduction in living organisms. There are two main types of cell division: mitosis (in eukaryotic cells) and binary fission (in prokaryotic cells). Additionally, eukaryotic organisms undergo a specialized form of cell … Read more

Transport across the cell membrane is essential for cells to exchange materials with their environment and maintain homeostasis. Types of transport across cell membrane mechanisms Passive transport across cell membrane Passive transport does not require energy input from the cell, as it relies on the natural movement of molecules from an area of higher concentration … Read more

Structure and functions of cell: Cells are the basic structural and functional units of life. They can be classified into two main types: prokaryotic cells (found in bacteria and archaea) and eukaryotic cells (found in plants, animals, fungi, and protists). Both cell types share some basic structures and functions, but eukaryotic cells are generally larger … Read more

The feedback mechanisms can be classified into two categories: Negative feedback in Homeostasis Process Positive feedback in Homeostasis Process Several organ systems play crucial roles in maintaining homeostasis Process including Nervous system Endocrine system Respiratory system Cardiovascular system Urinary system The urinary system filters waste products from the blood and maintains electrolyte balance and fluid … Read more