30 Questions
Cell injury occurs when cells are stressed and cannot adapt to ______.
injury
Atrophy is a ______ process except when it is caused by loss of nerve supply.
reversible
Hypertrophy occurs when a cell or tissue is exposed to ______ workload.
increased
Metaplasia is a process in which one cell type is converted to ______ cell type.
another
Prolonged smoking causes columnar epithelium to change to ______ epithelium in respiratory passages.
stratified squamous
Chronic ______ or inflammation can cause metaplasia.
irritation
Severe anemia reduces the ______ capacity of blood.
oxygen-carrying
Chemical agents can alter ______ pressure around the cell, resulting in cell injury.
osmotic
Infectious agents include ______, viruses, fungi, protozoa, and rickettsiae.
bacteria
Cellular swelling is caused by the accumulation of ______ due to failure of active transporters and cell membrane integrity.
water
Cellular accumulation can lead to the buildup of ______, protein, calcium, and uric acid.
fats
Necrosis occurs due to ______, toxins, infections, and trauma.
ischemia
Pyknosis is characterized by the nucleus ______
shrinks
In Karyorrhexis, the pyknotic nucleus is ______
fragmented
In Karyolysis, DNA is degraded by ______
endonuclease
Coagulative Necrosis is characterized by dead cells, but tissue structure remains intact for ______ to ______
days to weeks
In Liquefactive Necrosis, enzymes of leukocytes ______ the tissue
digest
Liquefied necrotic tissue is creamy yellow due to the presence of ______
dead leukocytes
The intrinsic pathway of apoptosis is activated in response to ______ damage or lack of oxygen or nutrients.
DNA
Caspases have two actions: catalyze mass ______ in the cytoplasm and activate nucleases.
proteolysis
The intrinsic pathway of apoptosis depends on ______ Activated from inside the cell.
mitochondria
Bcl2 proteins are ______ regulators of apoptosis that control release of mitochondrial proteins to the cytoplasm.
intracellular
Apoptosis depends on ______ proteins: proteolytic enzymes.
Caspase
Released mitochondrial proteins activated ______ that catalyze mass proteolysis and activate nucleases.
caspases
Bcl2 proteins cause dimerization of ______ proteins
Bax and Bak
Cytochrome c in cytosol activates ______ which have two actions
caspases
Cells fragment into membrane-bound pieces (apoptotic bodies), which are phagocytosed by ______
macrophages
The induction of apoptosis by the mitochondrial pathway involves the action of sensors and effectors of the ______ family
Bcl-2
Engagement of ______ receptors leads directly to caspase activation
death
Mitochondrial proteins, especially ______, leak into cytosol
cytochrome c
This quiz covers the concept of cell injury, its causes, and cellular adaptation mechanisms such as atrophy. It also explores the consequences of reduced cell or tissue use, including prolonged bed rest, disuse of limbs, and poor nutrition.
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