In this article, I briefly describe the basics of organ transplantation. Organ transplantation Removing an organ from one’s body and placing it in a recipient’s body to fulfill the need for a missing organ is known as organ transplantation. In the fifth century B.C., the legendary surgeon from India Sushruta, expressed nose reconstruction for the … Read more >>
In this article, I briefly describe the effector cells of the immune system. Effector cells The effector cells of the immune system are the differentiated cells mounting precise responses in the presence of a stimulus. Our immune system generates effector cells as a response against harmful pathogens. Effector cells are also produced against self-cells in … Read more >>
In this article, I briefly describe the blue-green algae, also known as cyanobacteria. The cyanobacteria- oxygenic phototrophic bacteria The blue-green algae (cyanobacteria) are one of the largest and most important groups of bacteria on earth. They belong to the diverse phylum of photosynthetic prokaryotes. They are chlorophyll-containing oxygenic phototrophic bacteria. These bacteria use various photosynthetic … Read more >>
In this article, I briefly describe the purple and green phototropic bacteria. Phototropic bacteria These are a group of bacteria that derive their energy for growth from sunlight, and their source of carbon comes from carbon dioxide or organic carbon. The phototropic bacteria can be categorized into two groups, i.e., anoxygenic phototrophic bacteria and oxygenic … Read more >>
In this article, I briefly describe the metabolism of fuel in fasting and starvation. Hormonal and metabolic adaptations Animals can withstand prolonged periods of starvation by adjuring a comprehensive program of hormonal and metabolic adaptations. This type of adaptation mainly provides glucose for the brain and fat-derived fuels for most of the other tissues of … Read more >>
In this article, I briefly describe the mechanism of killing of target cells by effector cells. Effector cells Effector cells are the cells of the adaptive immune system, carrying out an immune function in response to a stimulus. The group of effector cells that have direct cytotoxic activity on foreign cells and altered self-cells are … Read more >>
In this article, I briefly describe the maintenance of blood glucose levels by the hormones insulin and glucagon. Hormones Our endocrine system employs internal chemical messengers as hormones. These are produced by certain specific cell types. Hormones regulate the function of another tissue by binding to a distant cellular receptor. For binding with a receptor, … Read more >>
In this article, I briefly describe organ-specific autoimmune diseases. Autoimmunity The term “autoimmunity” defines the failure of a person’s immune system to recognize its cells as self. Thus, the immune system mounts an immune response against its healthy cells. Disease resulting from this type of immune response is known as autoimmune disease. Self-components are recognized … Read more >>
In this post, I briefly describe the MHC genes, haplotypes, and the diversity between different MHC classes. The MHC genes Vertebrate DNA is marked with a large locus known as the major histocompatibility complex (MHC). It contains closely linked polymorphic genes that code for cell surface proteins. These cell surface proteins are known as the … Read more >>
In this article, I briefly describe the breakthrough treatments of the human immunodeficiency virus (HIV) based on the protease mechanism. The disease caused by HIV and the symptoms The human immunodeficiency virus (HIV) attacks our immune system. The acquired immunodeficiency syndrome, a chronic immune system disease, is caused by HIV. It lowers the immunity of … Read more >>