Sourav Pan

Cilia are membrane-covered, microtubule-based projections that extend from the surface of many eukaryotic cells. Motile cilia generate movement of cells, fluids, or particles, whereas most primary cilia function as specialized sensory and signaling compartments. Their structure centers on an axoneme anchored to the cell by a basal body. What Are Cilia? Cilia are short hair-like … Read more

Learn the fluid mosaic model of the plasma membrane, including its definition, structure, components, features, membrane fluidity, evidence, limitations and modern modifications.

Learn what cell proliferation is, how the cell cycle and growth signals regulate it, how it differs from cell growth, and why it matters in development, tissue repair, and cancer.

Learn what the cell coat or glycocalyx is, its structure and composition, how it forms on the plasma membrane, and its major functions in protection, recognition and cell interactions.

Learn what mitosis is, how chromosomes move through each stage, the role of the mitotic spindle and cytokinesis, and how mitosis differs from meiosis.

Learn what meiosis is, how meiosis I and II reduce chromosome number, how crossing over creates genetic variation, and how meiosis differs from mitosis.

Learn what gametogenesis is, how germ cells form haploid gametes, and the stages, regulation, and key differences between spermatogenesis and oogenesis.

Learn what fertilization is, its major types, how sperm and egg unite, how polyspermy is controlled, and how fertilization differs in animals, humans, and flowering plants.

Learn what necrosis is, why it occurs, how cells change, the major patterns of necrosis, key examples, and how necrosis differs from apoptosis.