Do You Really Have a New Body Every 7 Years?

Do You Really Have a New Body Every 7 Years?

Assessment

Interactive Video

Science, Biology, Health Sciences, Chemistry

11th Grade - University

Hard

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The video debunks the myth that the human body replaces all its cells every seven years. It explains that while many cells do regenerate, the rate varies significantly across different cell types. Some cells, like those in the stomach, are replaced frequently, while others, like heart muscle cells, regenerate very slowly. Certain cells, such as neurons in the cerebral cortex, are never replaced. The video also discusses how carbon-14 from nuclear testing has helped scientists determine the age of cells by measuring its concentration in DNA, which remains constant throughout a cell's life.

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the common myth about the human body's cell replacement?

The body replaces all its cells every seven years.

The body replaces all its cells every month.

The body never replaces any of its cells.

The body replaces all its cells every year.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of cells are replaced most frequently in the human body?

Bone cells

Heart muscle cells

Stomach lining cells

Neurons in the cerebral cortex

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which cells in the human body are never replaced?

Red blood cells

Neurons in the cerebral cortex

Skin cells

White blood cells

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do scientists determine the age of cells using carbon-14?

By counting the number of cell divisions

By measuring the carbon-14 levels in the cell's DNA

By measuring the amount of carbon-14 in the atmosphere

By observing the cell under a microscope

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What historical event contributed to the ability to date cells using carbon-14?

The Industrial Revolution

The invention of the microscope

The discovery of DNA

The Cold War nuclear tests