Microscopes
What two properties make microscopes useful?
Magnification and Resolution.
What do cells in your lungs do?
They help you get oxygen.
What did Theodor Schwann conclude about animals?
All animals are made of cells.
What are cells?
Cells are the basic units of structure and function in living things that carry out all its functions.
What is a microscope?
An instrument that makes small objects look larger. It revealed cells and led to the development of cell theory.
Who discovered cells?
Robert Hooke
What did Matthias Scheldan conclude about plants?
All plants are made of cells.
What must a cell do to stay alive?
It must carry out many of the same functions as the entire organism.
How do microscopes work?
Some microscopes focus light through lenses to produce a magnified image, and other microscopes use beams of electrons.
What is cell theory?
The cell theory is a widely accepted explanation of the relationship between cells and living things.
What did Robert Hooke see when he looked at a slice of cork in his microscope?
He saw empty spaces (cells) that looked like rectangular rooms, he called these cells which mean small rooms.
What is the structure of living things determined by?
The way its cells are put together.
How do you measure microscopic objects?
You use a metric ruler to measure the size of the circular field in millimeters, or you can estimate the size of the object you see by comparing it to the width of the field.
What can cells provide clues about?
What the organism can do.
What did Rudolph Virchow propose about cells?
All cells come from preexisting cells.
What do cells in your digestive system do?
They absorb food that provides your body with energy and materials needed for growth.
How do you choose the lens on a compound microscope?
There’s one lens in the eye piece and a second chosen from any on the revolving nosepiece (you turn the nose piece to choose the lens).
What does Cell theory state?
It states that all living things are composed of cells, cells are the basic unit of structure and function in living things, and all cells are produced by other cells.
Who was the first person to see LIVING cells through a microscope?
Anton van Leewenhoek
What are the functions of an organism that allow it to live, grow, and reproduce?
Obtaining oxygen, food, and water, and getting rid of waste. Cells are involved in all these functions