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Questions and Answers
What is the process that eliminates unwanted cells during tissue sculpturing?
What is the process that eliminates unwanted cells during tissue sculpturing?
- Autophagy
- Apoptosis (correct)
- Necrosis
- Pyroptosis
Which type of caspases are responsible for the activation of the initiator caspases?
Which type of caspases are responsible for the activation of the initiator caspases?
- Procaspases
- Inflammation caspases (correct)
- Active caspases
- Effector caspases
During which process does the DNA undergo fragmentation?
During which process does the DNA undergo fragmentation?
- Pyroptosis
- Autophagy
- Necrosis
- Apoptosis (correct)
Which process involves the release of Cytochrome C and loss of mitochondrial membrane potential?
Which process involves the release of Cytochrome C and loss of mitochondrial membrane potential?
During the process of apoptosis, what is responsible for the activation of the initiator caspases?
During the process of apoptosis, what is responsible for the activation of the initiator caspases?
What is the term for the programmed cell death that involves shrinkage and condensation of chromatin?
What is the term for the programmed cell death that involves shrinkage and condensation of chromatin?
What is the main type of proteases involved in the intracellular machinery for apoptosis?
What is the main type of proteases involved in the intracellular machinery for apoptosis?
Which type of cell death involves shrinkage and condensation of chromatin, cytoskeleton collapse, and degeneration of the nuclear envelope?
Which type of cell death involves shrinkage and condensation of chromatin, cytoskeleton collapse, and degeneration of the nuclear envelope?
Which process involves the release of Cytochrome C and loss of mitochondrial membrane potential, leading to the activation of caspases?
Which process involves the release of Cytochrome C and loss of mitochondrial membrane potential, leading to the activation of caspases?
What is responsible for the formation of apoptotic bodies during apoptosis?
What is responsible for the formation of apoptotic bodies during apoptosis?
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Study Notes
Cell Death and Apoptosis
- Billions of cells die every hour in a human adult body, which is essential for development.
- Apoptosis is a form of programmed cell death, also known as cell suicide, proposed in the 1970s.
- It took 20 years for apoptosis to be widely accepted, leading to a Nobel prize in 2002.
- Apoptosis occurs in both unicellular and multicellular organisms, from molecular to developmental levels.
Role of Apoptosis
- Apoptosis is a quality control process that eliminates abnormal, nonfunctional, and potentially dangerous cells, including cancerous cells.
- It plays a crucial role in maintaining development homeostasis, sculpting and replacing aged or nonfunctional cells with new ones.
- Apoptosis is responsible for eliminating unwanted cells, as seen in the development of the mouse paw.
Characteristics of Apoptosis
- Morphological changes occur during apoptosis, leading to cell death.
- Biochemical changes also occur during apoptosis, contributing to the elimination of unwanted cells.
Importance of Apoptosis
- Apoptosis is essential for normal development, as it helps to remove unwanted cells and maintain tissue homeostasis.
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