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Transcript
Name:_______________________________________
INTRODUCTION TO CELLS
(Panda book p.69-80)
3-1 The Cell Theory
A cell is defined as ______________________________________________________________
________________________. Cells contain structures called ___________________________. This
terms means tiny _________________________. Cells were first described by the English scientist
__________________
_________________, who thought that they resembled tiny rooms, or cells,
where monks live. (Actually, ______________________
cells—just the _____________________
________________ did not see living
___________ of dead cork cells.)
The discovery of cells and their internal parts was made possible by the invention of the
____________________________ in the ____________ century. During the next two hundred years,
the work of many scientists led to the development of the _______________ theory. This theory can be
summarized in three statements:
1. _________________________________________________________________________________
2. _________________________________________________________________________________
_________________________________________________________________________________
3. _________________________________________________________________________________
3-2 Structure and Function of Cells
CELL PART
DESCRIPTION
Strong, stiff,
nonliving layer
outside the cell
membrane, made of
cellulose
FUNCTION/JOB
PLANT
ANIMAL
BOTH?
Cell membrane
Nucleus
Allows materials to pass into or out of the
nucleus
Chromosomes
Nucleolus
One of a set of
structures found in
the nucleus; made of
DNA, plus some
protein
Both
Region between the
nucleus and the cell
membrane; consists
of a jellylike
substance that
contains many
organelles.
Endoplasmic
reticulum
Small, grain-like
body made of RNA,
may be attached to
the endoplasmic
reticulum or floating
freely in the
cytoplasm; produced
in the nucleolus.
Rod-shaped
organelle; located in
the cytoplasm; has a
smooth outer
membrane and a
greatly folded inner
membrane
Place where proteins are made.
Both
Vacuole
Animal,
rare in
plant cells
Lysosome
Captures energy in sunlight and uses it to
produce food
Review of Ideas:
1. Name the organelles that are found in the cytoplasm:_______________________________________
2. Name two cell parts that are found in plant cells and are not found in animal cells. _______________
____________________________________________________________________________________
3. Why is the process that takes place in the mitochondrion often described as being the opposite of the
process that takes place in the chloroplast? _________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________