Cellular adaptation

Atrophy[ edit ] Atrophy is a decrease in cell size. If enough cells in an organ atrophy the entire organ will decrease in size. Thymus atrophy during early human development childhood is an example of physiologic atrophy. Skeletal muscle atrophy is a common pathologic adaptation to skeletal muscle disuse commonly called "disuse atrophy".

Cellular adaptation

Updated on August 31, Cellular Adaptations Hypertrophy, Hyperplasia, Atrophy and Metaplasia are the main four types of cellular adaptations.

VPAT | UNIT 4 - Disturbances of Cell Growth | Cellular Adaptation

Reversible changes In the number, size, phenotype, metabolic activity or functions of cells In response to the changes in the environment stress. Increase in cell size Occurs in: Physiological — skeletal muscle in body-builders Cellular adaptation — enlargement of cardiac muscle due to hypertension Molecular Mechanism: Gene activation, protein synthesis and production of organelles Definition: Increase in the number of cells Occurs in: New cells from stem cells Atrophy Definition: Shrinkage in the size of the cell by loss of cell substance Atrophy results from: Increased protein degradation in cells: Decreased workload Atrophy of Disuse — limb atrophy after immobilization for fracture Loss of innervation Denervation atrophy — thenar muscle atrophy after media nerve injury Diminished bood supply — atherosclerosis of vessels with aging leads to cerebral atrophy Inadequate nutrition — marasmus Loss of endocrine stimulation — loss of estrogen stimulation after menopause results in atrophy of endometrium, vaginal epithelium and breast Aging senile atrophy — cell loss in brain and heart Pressure — enlarging benign tumour can cause atrophy in surrounding compressed tissues Molecular Mechanism: Autophagy of cellular components:May 23,  · Cellular adaptation refer to (usually) reversible changes in size, number, phenotype or appearance, metabolic activity or functions of cells in response to adverse environmental conditions or internal bodily stresses.

In cellular adaptation, the altered steady state of the cell is achieved, preserving the viability of the cell and modulating its function as a response to such stimuli.

Cellular adaptation

Cell adaptation can be divided in two main groups: acquired and developmental disturbances. This lesson will compare and contrast different types of cell, organ, and tissue growths.

More specifically, we'll cover hypertrophy, hyperplasia. May 23,  · Cellular adaptation refer to (usually) reversible changes in size, number, phenotype or appearance, metabolic activity or functions of cells in response to adverse environmental conditions or internal bodily stresses.

The cellular adaptation depicted here is hyper-trophy, the type of reversible injury is ischemia, and the irreversible injury is ischemic coagulative necrosis.

In the example of myocardial CHAPTER 1 Cell Injury, Cell Death, and Adaptations 3 C Figure 1–3 Physiologic hypertrophy of the uterus during pregnancy. Gross appearance of a normal. Dec 29,  · Reversible cell injury - General Pathology Animated USMLE Lecture -Dr Bhanu prakash - Duration: ashio-midori.com Prakash - Medical Animations 15, views.

Cellular Adaptations | Epomedicine