Questions and Answers
Which type of cell, despite having limited ability to replicate, has a unique ability to repair and grow its tissue?
Which of these cell types is responsible for the formation of scar tissue after heart damage?
Which of the following statements is TRUE regarding the ability of neurons to replicate?
Which of these cell types has a finite number produced before birth and cannot be replenished afterwards?
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Which of these cell types is produced from hematopoietic stem cells, a type of stem cell found in the bone marrow?
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Which of these cell types, despite having a limited capacity for self-replication, are essential for the function of the nervous system?
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Study Notes
Limited Cell Replication in Humans
- Certain human cells exhibit limited or no replication capability after maturation.
Neurons in the Central Nervous System
- Most neurons in the brain and spinal cord are classified as post-mitotic, meaning they do not divide post-maturation.
- Neurogenesis can occur in specific areas such as the hippocampus, where a limited number of new neurons may be generated.
Cardiac Muscle Cells (Cardiomyocytes)
- Adult cardiac muscle cells have an extremely restricted capacity for regeneration.
- Damage from heart attacks typically leads to the formation of scar tissue rather than the regeneration of cardiomyocytes.
Skeletal Muscle Cells
- Skeletal muscle cells are multinucleated and do not undergo division.
- Repair and growth of skeletal muscle tissue are facilitated by satellite cells, which are a type of muscle stem cell that can proliferate and differentiate.
Red Blood Cells (Erythrocytes)
- Mature erythrocytes are anucleate, lacking a nucleus, hence they cannot divide.
- These cells are generated from hematopoietic stem cells found in the bone marrow.
Oocytes
- Female gametes or oocytes are produced before birth in a finite number and cannot be renewed or divided post-birth.
Implications for Medical Treatments
- Recognizing the limitations of cell replication is fundamental for advancing treatments for various medical conditions, including neurodegenerative diseases, heart disease, and muscle atrophy.
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Description
This quiz covers human cells that have limited or no ability to replicate, including neurons and cardiac muscle cells. Learn about their unique characteristics and exceptions.
