3- Changes in the Cell Flashcards
The 3 type of cell changes
Functional reversible
Structural reversible
Structural irreversibl
Consequences of cell injury
morphological (structure) damage and functional damage, either causing the other
Types of functional reversible
Cell & Tissue Accumulation
Adaptive Responses to Cell Changes
Types of functional reversible - Cell & Tissue Accumulation
Hydropic changes
Fatty Changes
Residual bodies
Hyaline changes
Hydropic changes aka
hydropic degeneration, cloudy swelling
Hydropic changes causes a functional inability to produce
ATP
(mitochondrial damage)
For the sodium to move out it requites ___
ATP
(for the Na/K pump)
Na+ ions cannot be pumped out of the cell which increases _____
cellular osmotic pressure
To balance the osmotic pressure
Water moves in
(causing cell swelling)
As the convoluted tubules cells swell, the lumen size ______
decrease
Define Poiseuille’s Law
The amount of fluid that flows through the opening (lumen) is proportional to the pressure difference at each end to the 4th power of the radius
If lumen is decreased by 2 flow amount is
decreased by the power of 4
Compress glomerular cells leads to
metabolite accumulation in the blood
kidney failure
Fatty Changes aka
Steatosis
Def: Fatty Changes
accumulation of triacylglycerids (fatty acids) in parenchymal cells
Fatty Changes effect on cells
compress the cell contents moving them to the periphery of the cell
reducing function
can cause cell rupture
Fatty changes most common sites
Liver (classic)
Kidney
Heart
Fatty changes causes
Protein malnutrition
Intoxication
Cardiac anoxia
Obesity
Diabetes mellitus
Define Anoxia
lack of Oxygen to drive reactions for lipoprotein synthesis
Hepatocytes produce lipoproteins using
Free FA
AA
Over consumption of alcohol damages hepatocytes leading to
accumulation of FA’s and swelling of cells
(liver fibrosis)
Not enough amino acid in diet can lead to
FAs accumulate in the liver
long term of fatty changes in hepatocytes can result in
liver failure
define Residual bodies
scar/fragment of cell damage
Intracellular accumulation of residual bodies is related to the cell’s capacity to cope with
threatening bacteria
damaged organelles
Residual bodies mostly target
liver
kidney
nervous tissue
most common residual body, parts of subcellular membranes which are indigestible, pigment of aging, “brown atrophy
Lipofuscin granules
Lipofuscin granules aka
Lipochrome granules
Hyaline changes aka
Hyalinization
Hyaline changes types
Intracellular (reversible)
Intercellular (structural irreversible)
Intracellular hyaline changes subtypes
Reabsorption droplets
Mallory alcoholic hyaline
Russell bodies
Dutcher bodies
Reabsorption droplets happens in
renal proximal tubules
Def: Abnormal protein loss in the urine that the tubules attempt to reabsorb
proteinuria
Nephritic syndrome
minimal change disease
protein is deposited within the cells of the distal convoluted tubules
once excess protein excretion stops, the cells will release the deposited protein (reversible)
Mallory Alcoholic Hyaline aka
Mallory bodies
Mallory bodies are found within
hepatocytes
Mallory bodies result from
excsessive drinking
(reversable)
Russell bodies are found in
cytoplasm of plamsa cells
Russell bodies are seen in patients with
Multiple myeloma
Define Multiple myeloma
malignant condition; uncontrolled proliferation and disorder function of plasma cells in bone marrow
Intranuclear (nucleus) accumulation of proteins are called
Dutcher bodies
Waldenström Macroglobulinemia
aka’s
Hyperviscosity syndrome
Lymphoplasmocytic lymphoma
Define Waldenström Macroglobulinemia
A type of lymphoma due to a monoclonal tumor
Define monoclonal tumor
cancer of B lymphocytes resulting in overproduction of IgM
Increased IgM production leads to
increased thickness of blood
whay kind of bodies are commonly seen in monoclonal tumor
Russell bodies
Dutcher bodies
Hyline Intercellular changes are (reversible/irreversible)
irreversible
hardening of the arterioles due to hyaline (protein) accumulation is called
Hyaline arteriosclerosis
Hyaline arteriosclerosis causes
arterioles to become brittle and/or obstruction of lumen occurs
(can lead to obliteration)
Within the brain, Hyaline arteriosclerosis can lead to
Lacunar infarction
Parenchymal (intracerebral) Hemorrhagic stroke
Lacunar infarction includes
thalamus
putamen
globus pallidus
Define Parenchymal (intracerebral) Hemorrhagic stroke
rupture of hardened arterioles, cases of hypertension
a generic term for a variety of proteinaceous materials that are abnormally deposited in tissue interstitium in a spectrum of clinical disorders, mainly autoimmune
Amyloid
Name of “diseses” caused by amyloid
Amyloidosis
Amyloidosis leads to death within
1-2 years
primary reason of Amyloidosis
idiopathic
amyliod deposits are found between
cells in the interstitial fluid of the brain, liver,
kidney, and skin
Kidney amyloidosis characterized by
extreme proteinuria
list the Adaptive Responses to Cell Changes (Functional reversible)
Alternative metabolism
Altered Size
Inadequate Neurological Stimulus
Inadequate Hormonal Stimulus
Cells use of alternative pathways in order to obtain ____
ATP
Oxidative phosphorylation produce ____ ATP
32
Anaerobic Glycolysis produces ____ ATP
2
Altered Size devided into:
(Functional reversible/Adaptive Responses/altered size)
Hypertrophy
Atrophy
Define hypertrophy
organ or cell enlargement due to increased demands
in Muscle hypertrophy, does the cells replicate or enlarge?
Enlarge
What causes left ventricular hypertrophy
increases the demand on the heart and arterial system
normal ratio left to right ventricle is
Left 2:1 right
Define atrophy
shrinkage due to decreased demand
2 types of atrophy are
disuse atrophy
pressure atrophy
Def: loss of bone mass, is one form of disuse atrophy
(not a primary cause)
Osteoporosis
Osteoporosis is caused by
disuse but also commonly due to hormonal changes
sexual changes (decreased androgens)
Osteoperosis Major locations are
primary bones
(ribs, vertebral bodies, neck of femur, wrist bones)
Osteoperosis can result in
Bone fractures (rib, fumer …)
Vertebral body compression
Most vurnable popluation to osteperosis are
Caucasian Blonde women
Least vurnable popluation to osteperosis are
African American women
almost all of our bone mass is accumulated before the age of
25 - 30
normal rate of bone loss is
0.7% per year
Why obese people have lower changes of getting osteoporosis?
fat accumulates estrogens and can continue to release it post menopause
increased weight bearing
Type of atrophy results from Cells/Tissue compresstion or blood supply is compressed
pressure atrophy
Poliomyelitis is an example of
(what type of changes)
Inadequate Neurological Stimulus
Functional reversible/Adaptive Responses to Cell Changes/Inadequate stimulus
Define Poliomyelitis
Viral (contagious) loss of neuronal stimulus to muscles
where does the neuron damage happens in poliomeylitis?
anterior horn of spinal cord (motor)
Poliomylites leads to
Decreased motor function due to atrophy of skeletal muscles
The only way to prevent Poliomyelitis is by
polio vaccine
2 examples of Inadequate Hormonal Stimulus
Hoshimoto’s Thyroiditis
Grave’s Disease
Hoshimoto’s Thyroiditis
ultra-antibodies attach to ______
TSH Receptors
Hoshimoto’s Thyroiditis
Attachment of ABs to recpetors will prevent
TSH from the anterior pituitary to bind
Hoshimoto’s Thyroiditis
What resutls from the bockage of TSH receptors
Thyroid gland atrophy
stops production of thyroid hormone
Most common cause of Hypothyroidism in the US
Hoshimoto’s Thyroiditis
First autoimmune disease discovered, in 1913 is:
Hoshimoto’s Thyroiditis
The main cause of Hashimoto’s Thyroiditis
Autoimmune, idiopathic
how graves disease is different than Hashimoto’s
Antibodies bind to TSH receptors and mimic TSH
Graves disease results in
excess production of thyroid hormone
(Hyperthyroidism)
Graves disease
What happens to thyroid cells after increasing their function
become hypertrophies
Graves disease
Female to male ratio
Female 2 : 1 Male
Graves is Characterized by
goiter
exophthalmos