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Developmental Processes in Early Development

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Developmental Processes in Early Development

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Questions and Answers

Which of the following is a characteristic of non-proliferative cells according to the text?

They are replaced via the proliferation of stem cells

They migrate to different locations

They have short life spans and must be replaced by continuous cell proliferation (correct)

They continuously divide throughout life

What is the role of stem cells in the process of cell replacement in differentiated tissues?

Stem cells remain arrested in the G0 stage of the cell cycle

Stem cells differentiate to create specialized types of cells

Stem cells migrate to different locations

Stem cells divide to produce daughter cells that can either differentiate or remain as stem cells (correct)

Which type of cells are characterized by continuous division throughout life in adult animals?

Blood cells

Cardiac muscle cells

Endothelial cells of blood vessels

Fibroblasts (correct)

What is a common feature of fully differentiated cells in adult animals?

They remain arrested in the G0 stage of the cell cycle Signup and view all the answers

In which type of cell division do stem cells produce daughter cells that will remain as stem cells?

Symmetric division Signup and view all the answers

Which tissues have fully differentiated cells that must be replaced by continuous cell proliferation?

Skin and epithelial cells lining the digestive tract Signup and view all the answers

What is cell proliferation defined as in the text?

Increase in cell number caused by cell growth and division Signup and view all the answers

Which type of stem cells are predefined to differentiate into a specific lineage according to the text?

Hematopoietic stem cells Signup and view all the answers

What is the main difference between apoptosis and necrosis as mentioned in the text?

Apoptosis is cell death mediated by an intracellular program, necrosis is caused by infection or injury Signup and view all the answers

What does pluripotency refer to according to the text?

The ability to give rise to all differentiated cell types of ectoderm, endoderm and mesoderm Signup and view all the answers

What is one common activity where cell migration plays a crucial role according to the text?

Embryonic development Signup and view all the answers

During differentiation, what changes occur in a cell according to the text?

Change in membrane potential and responsiveness to signals Signup and view all the answers

What is growth death as defined in the text?

Biological cell ceasing to carry out its functions Signup and view all the answers

What is the primary purpose of differentiation as mentioned in the text?

To fit cells' functionality by changing size and shape Signup and view all the answers

In which phase of the cell cycle does growth primarily occur according to the text?

G1 phase Signup and view all the answers

What is necrosis primarily caused by according to the text?

External factors like infection or injury Signup and view all the answers