SAS1: Introduction to Pathology Flashcards
Are the basic units of tissue, which form an organs and system in the human body?
Cells
The two main types of body cell
Epithelial and Mesenchymal cells
A person to first published cellular theory of disease bringing in the concept that disease occur due to abnormalities at the levels of cell.
Virchow
Is defined as a variety forms of stresses a cell encounters as a result of changes in its internal external environment
Cell injury
The stress is mild to moderate, the cell injured may recover
Reversible Cell Injury
The residual effects of reversible cell injury may persist in the cell as evidence of cell injury at subcellular level.
subcellular changes
Metabolites may accumulate within the cell.
Intracellular accumulations
The cells may be broadly injured by two major ways:
Genetic cause
Acquired cause
Deficiency of oxygen result in failure to carry out activities of cells.
Hypoxia and Ischaemia
The most common cause of cell injury.
Hypoxia
Reduced supply of blood to cells due to interruption ei. ischemia
Hypoxia
Physical agents in causation of disease is under ?
Mechanical Trauma
Trauma cause by heat or cold
Thermal Trauma: Physical Trauma
Trauma cause by ultraviolet and ionizing
Electricity; Radiation : Physical Trauma
An ever increasing list of chemical agents and drugs may cause ,what type of cell injury?
Chemicals and Drugs
Injuries by microbes including infection caused by bacteria, rickettsiae, viruses, fungi, protozoa, metazoa and other parasites.
Microbial Agents
Immunity is a double edge sword it protects the host against various injurious agents but also turns lethal and cause cell injury
Immunologic Agents
A deficiency or an excess of nutrients may result in nutritional imbalances, may be due to overall deficiency in nutrients.
Nutritional Derangements
Senescence leads to impaired ability of the cells to undergo replication and repair leading to cell death.
Aging