Understanding AIDS, Renal Pathophysiology, and Metabolic Stress
AIDS and HIV Infection
What is AIDS?
AIDS, a disease caused by HIV, manifests after infection with the human immunodeficiency virus (HIV).
- Syndrome: A group of signs and symptoms characterizing a disease.
- Immunodeficiency: The body’s inability to defend against microorganisms.
- Acquired: Unlike other immunodeficiencies, AIDS is not congenital but caused by an external factor.
Etiologic Agent: HIV
HIV is a retrovirus (an RNA virus that replicates via a DNA intermediate). It’s fragile and easily inactivated
Read MoreCell Biology: History, Structure, and Organization
Cell Biology: A Comprehensive Study
History of Cell Biology
Robert Hooke (first to observe cells in cork), Robert Brown (discovered the cell nucleus), Purkinje (coined the term protoplasm), and Schwann and Schleiden (*Cell Theory*).
Cell Structure and Organization
Theme
Cells exhibit diverse shapes: star-shaped, elongated, cylindrical, etc.
Size
Cell size varies greatly; most are microscopic. Measurement units include microns and Angstroms.
Organization
Prokaryotic cells (bacteria): Organelles lack membrane-
Read MoreUnderstanding Evolutionary Processes and Theories
What is the name of the scientific theory that is able to overcome each of the following falsehoods? (Let no one say that no one has seen other species become evidence that this change does not occur). The continents do not move, but you would notice. The theory that allowed it to overcome the fixism of biological evolution (Darwinism). The observation error of fixism is related to the age of the Earth and the concept of geological time. Only when it was on an Earth of many millions of years ago
Read MoreHuman Anatomy and Physiology
Anatomy: the science of body structures and their components; their shape, size, and position.
Physiology: the science that studies the functions of these structures and bodily processes; how body parts work.
Pathology: the branch of medicine that studies diseases, their causes, and manifestations.
Biochemistry: the science that studies biological processes at the molecular level.
2-ANALYSIS OF THE HUMAN BODY’S HIERARCHICAL STRUCTURE
- The chemical level: atoms and molecules. Atoms and molecules combine
Sandy & Rocky Beach Ecosystems: A Comprehensive Study
Sandy beach communities generally have uniform topography. Wave action, sunlight, and dryness affect the beach uniformly, and life depends mainly on tidal amplitude. Dead organisms are common; birds, rodents, and insects are often observed, along with microalgae.
Coastal System or Phytalidae
Supralittoral Zone: The dominant species is the carter (please specify the full scientific name).
Mesolitoral Zone: Dominant species include Emerita analoga, along with mollusks, crustaceans, polychaetes, and
Read MoreCell Organelles
Organelle | Location | Features | Role |
Capsule | Covers the cell wall of some bacteria. | Viscous cell envelope polysaccharide. | Determines the degree of pathogenicity of the bacteria. |
Cell wall | Coats the cell membrane of plant cells, bacteria, cyanobacteria, and fungi. | Rigid structure consisting of cellulose in plant cells, peptidoglycan in bacteria, and chitin in most fungi (except mycoplasmas). | Provides rigidity and allows the passage of water, air, and dissolved materials. Cells walls have holes allowing material |