7.1 Flashcards
(26 cards)
All living things are made of ___________-
Cells
What is a cell?
the basic unit of structure and function in a living thing
Your body is composed of ___________ of cells.
trillions
Examples of cells include:
skin cells, muscle cells, blood cells, nerve cells
Each cell has a unique ____________ and ___________.
structure, function
Each cell in your body shares the ____________________ of all living things.
characteristics
Each cell can:
respond, grow, reproduce, use energy
Who was the first to observe cells?
Robert Hooke
What did Robert Hooke think cells looked like?
tiny rooms
Robert Hooke observed cells using what?
a microscope
Who was the “father of microbiology”?
Leeuwenhoek
What did Leeuwenhoek use to make his microscope?
lenses
Leeuwenhoek first observed:
blood cells, single celled protists, bacteria
Matthias S. and Theodore S. concluded what?
That all plants and animals were made up of cells.
Cells do not usually ______.
glow
What do scientists use to make cells glow?
Florescent proteins
Cells __________ florescent proteins like stains.
absorb
What is the cell theory?
all living things are made of 1+ cells, cells only come from existing cells, all of an organism’s life functions occur within cells, cells contain DNA to pass along.
In the 1800s, where did people believe living things came from?
nonliving things
Who proposed that cells came from other cells?
Rudolf Virchow
What is a cell membrane?
A separating barrier that controls moving materials in and out of the cell.
What is an organelle?
A structure in a cell that helps it perform its functions.
What is cytoplasm?
A fluid mixture that contains organelles and compounds that the cell needs.
What is DNA?
A molecule inside cells that contains all of the genetic information needed for the development and function of an organism.
