11/3 - 13/3 Flashcards
What is a risk factor for acute viral hepatitis?
Intravenous drug use
This condition is associated with panlobular inflammation, hepatocyte injury, and cell death.
What characterizes the infection control mechanism in acute viral hepatitis?
Cytotoxic T-cell-mediated signals cause hepatocyte apoptosis
This process is marked microscopically by the presence of Councilman bodies.
What are Councilman bodies?
Round, intensely eosinophilic bodies
They are indicative of hepatocyte apoptosis in acute viral hepatitis.
What is hyperplasia?
Increase in cell number leading to increased organ size
This is one of the forms of cellular adaptation.
What is hypertrophy?
Increase in cell size leading to increased organ size
This is another form of cellular adaptation.
What is atrophy?
Decrease in cell size leading to decreased organ size
It refers to the reduction in the size of an organ or tissue.
What is metaplasia?
Replacement of one differentiated cell type with another
This occurs as a response to chronic irritation or injury.
What is the definition of cellular adaptation?
Changes in cell size, number, or type in response to stimuli
It includes processes such as hyperplasia, hypertrophy, atrophy, and metaplasia.
Fill in the blank: Hyperplasia is an increase in cell _______.
number
Fill in the blank: Hypertrophy is an increase in cell _______.
size
Fill in the blank: Atrophy is a decrease in cell _______.
size
Fill in the blank: Metaplasia involves the replacement of one differentiated cell type with _______.
another
True or False: Cytotoxic T-cell-mediated signals promote hepatocyte survival.
False
These signals lead to apoptosis, not survival.
What are the clinical manifestations of digoxin toxicity?
Life-threatening arrhythmias, anorexia, nausea & vomiting, abdominal pain, fatigue, confusion, weakness, color vision alterations.
What is digoxin used to treat?
Atrial fibrillation and systolic heart failure.
How is digoxin cleared from the body?
It is renally cleared.
Why does digoxin toxicity frequently occur in elderly patients?
Due to decreased renal function with age, often without a rise in serum creatinine.
What are the routes of cancer spread?
Direct invasion, lymphatics, hematogenous, transcoelomic, perineural.
What is the definition of direct invasion in cancer spread?
Extension into neighboring tissues.
What does lymphatic spread in cancer involve?
Embolic drainage or invasion into lymphatic channels allows spread to regional lymph nodes.
What is hematogenous spread in cancer?
Embolic spread through the vasculature (usually veins).
What is transcoelomic spread in cancer?
Spread throughout a body cavity.
What is perineural spread in cancer?
Spread along nerves or nerve sheaths.