LESSON 1 Flashcards
in 1950 Zacharias Janssen invented the
microscope
while looking at the piece of cork under the microscope Robert Hooke saw box-shaped structures that he called
cell
in 1674 anton van Leeuwenhoek (father of microbiology) while looking at a pond water under the microscope, observed what he called
animalcules
in 1838, Mathias schleiden a germal botanist, stated that plants are made up of
cells
in 1839 Theodor Schwann a German physiologist conclude that animals are also made up of
cells
in 1855 Rudolf Virchow stated that cells come from pre-existing cells through
cell division
the 19th century contains 3 postulates and these are:
1. All living things are made up of cells.
2. Cells are the basic unit of structure and function in an organism.
3. Cells come from pre- existing cells.
there were 3 added postulates to the cell theory due to the modernization
4. Cell carry genetic material which is passed from one cell to another during cell division .
5. All cells are basically the same in structure and chemical composition.
6. Energy flow ( biochemical processes )
occurs within cells
literally means little organs
organelles
specialized structures found within the cell which perform specific function vital to a a cell's life
organelles
a thin double layer of protein and fat
cell membrane
separates the inner contents of the cell with its environment
cell membrane
regulates the passage of materials in and out of the cell
cell membrane
Security guard
cell membrane
a rigid membrane surrounding plant cells made up mostly of cellulose
cell wall
gives the cell protection, support, and structure
cell wall
a membrane-bound spherical body discovered by Robert Brown in 1831
nucleus
stores the cell's DNA
nucleus
controls and regulates cell activities
nucleus
controls the synthesis of ribosomes and proteins
nucleus
brain of the cell
nucleus
a spherical body found inside the nucleus
nucleolus
•produces and assembles ribosomes
nucleolus
a large complex of protein and RNA
ribosome
site of protein synthesis
ribosome
Protein factory
ribosome
a double-membraned, rod-shaped organelle
mitochondria
has its own DNA
mitochondria
•produces chemical energy needed to power the cell in the form of ATP (adenosine triphosphate)
mitochondria
Powerhouse of the cell
mitochondria
a series of interconnected membranous sacs and tubules
endoplasmic reticulum
Subway system
endoplasmic reticulum
with ribosomes attached to its surface
rough er
•modifies proteins synthesized by ribosomes
rough er
•makes phospholipids for cellular membranes
rough er
•no attached ribosomes
smooth er
production of carbohydrates, lipids and steroids
smooth er
•detoxification of drugs and toxins
smooth er
•storage of calcium ions
smooth er
a series of flattened, sac- like membranes that resembles a stack of pancakes
golgi body
sort, tag, package and distribute lipids and proteins
golgi body
mailman
golgi body
•spherical bodies containing digestive enzymes
lysosome
digests cellular nutrients
lysosome
breaks down worn-out or damaged organelles
lysosome
cell aids in apoptosis (programmed cell death)
lysosome
Garbage collector
lysosome
a long, disc-shaped organelle containing the pigment chlorophyll
chlorophlast
site of photosynthesis
chlorophlast
cafeteria of the cell
lysosome
a large space within the cell that is enclosed in a membrane and filled with fluid
vacuole
maintains water balance
vacuole
•maintains cell shape
vacuole
plant cell stores nutrients and waste products
vacuole
• a network of protein filaments or fibers
cytoskeleton
Types: microfilaments, microtubules and intermediate filaments
cytoskeleton
provides shape and structure
• movement
cytoskeleton
involved spindle formation during cell division
cytoskeleton