Definition of Pseudostratified columnar epithelium A pseudostratified columnar epithelium an epithelium made up of only one layer of cells which creates the appearance of multiple layers due to the nuclei in the cells are located at various levels. It is histologically an epithelium that is simple, even though when viewed from a cross-section it could … Read more
Learn how signal transduction pathways convert cellular signals into responses through receptors, signaling cascades, phosphorylation, second messengers, amplification, and major pathway examples.
Pathogenicity is the capacity of a microorganism to cause disease in a host. Virulence refers to the intensity or degree of pathogenicity. The virulence varies among different microorganisms and also among strains of same species. Virulence factors are the structures, substances or properties which help a pathogen to cause infection. These factors help the microorganism … Read more
Learn the Davson–Danielli sandwich model of the cell membrane, including its structure, evidence, limitations, rejection, and fluid mosaic comparison.
Learn about mesosomes in bacteria, including their definition, structure, types, proposed functions, NCERT description, and why modern science considers them fixation artifacts.
Learn what inclusion bodies are, their types, functions and examples in bacteria, viruses and cells, including storage granules, viral inclusions and protein inclusion bodies.
Learn about the nucleoid, its definition, structure, composition, functions, DNA organization, nucleoid-associated proteins, diagram, and nucleoid vs nucleus.
Chromosomes are a collection of tightly coiled DNA that are located in the nucleus of virtually every cell of our body. Humans possess 23 chromosome pairs.
A chromosome disorder, also known as Chromosome Abnormalities is caused by an alteration in the size or the structure of chromosomes.
What is Cell Signaling? Three Stages of Cell Signaling Cell signalling can be defined simply as the creation of a “signal” by a single cell. The target cell then receives this signal. In actuality, signal transduction is stated to involve three phases: Types of Cell Signaling Pathways Cell signalling plays a crucial role in enabling … Read more
