Cell Video Questions

The building blocks of life are cells.

All cells in a human are not the same. Please give examples of at least two different types of cells in humans.

Two different types of cells are cells such as white blood cells and stem cells

Why are cells not the same?

They are specialized to perform different functions.


The first person to discover cells was Robert Hooke. He called them cells because they looked like the cells that monks live in. He first saw cells when he was looking at a piece of cork under a microscope.


The cell theory was created by Schleiden and Schwann.

All cells arise from pre-existing cells.

Unlike animal cells, plant cells contain the organellescell walls and chloroplasts.


All animal cells are covered in a cell membrane. The function of this is to support the cell and regulate what goes in and out of the cell.


The different parts of the cell are known as organelles. Each organelle has a specific function. The function of the nucleus is to control the actions of the cell. The mitochondria are also known as the powerhouses of the cell because their function is to produce energy for the cell to use. Storage is the main function of the vacuoles.


Bacteria are interesting organisms. Bacterial cells do not have a nucleus. Instead the chromosomes of the cell are located in the cytoplasm instead of the nucleus.


There are different types of transport used in cells as well. diffusion is the movement of particles from high concentration to low concentration. Osmosis is different than this because it requires a difference in concentration at two different points in a solution and a permeable membrane between those points.


What is the difference between active and passive transport?

Active transport requires energy to perform and passive trtansport doesnt require any energy.

What organelle makes the energy used in active transport?

The mitochondria

Is a virus a living cell?

This is not sure about a virus. Viruses do not belong to the kingdom of living things though. It is also one of the most debated subjects up to this day.

What is contained inside a virus?

A strand of DNA or RNA.

What is the only life function of a virus?

to infect a cell and reproduce from that cell.