Study Set Content:
Virchow popularized
the maxim
Omnis cellula e cellula ("Every cell originates from
another existing cell like it.").
His genuine experimental
contribution to our knowledge about the origin of cells has
been questioned. It has been authoritatively claimed that
Virchow plagiarized
Remak's work.
Rigidity, mechanical support, protection
Cell wall
allows outward and inward movement of
molecules across it like diffusion, osmosis,
active transport, phagocytosis and pinocytosis
Cell
membrane
It is the control centre of the cell. It contains
genetic material DNA which regulates all
metabolic activities of the body
Nucleus
Helps in intracellular transportation; It provides
mechanical support to cytoplasmic matrix; It
helps in the formation of microbodies, nuclear
membrane and golgi complex; It helps in
detoxification of metabolic wastes
Endoplasmic
reticulum
They store the product of ER, produce
Lysosomes, secrete various enzymes, hormones
and cell wall material
Golgi
apparatus
Synthesizes and stores energy rich molecules,
ATP, during aerobic respiration
Mitochondria
Intracellular digestion, Destroy old and non
functional cells, Recycles worn out cells
Lysosomes
Sites of protein synthesis
Ribosomes
ribosomal RNA (rRNA) synthesis and ribosome
biogenesis
Nucleolus
assist with cell
movement; Actin works with another protein
called myosin to produce muscle movements,
cell division, and cytoplasmic streaming.
Microfilament (actin):
help support and give
shape to the cell, serve a transportation
function, as they are the routes upon which
organelles move through the cell
Microtubule (tubulin):
involved in lipid metabolism and the conversion
of reactive oxygen species such as hydrogen
peroxide into safer molecules like water and
oxygen.
peroxisome
aid in cell division by facilitating the separation
of chromosomes
Centrioles
site of most metabolic processes, transports
metabolites, and is involved in signal
transduction within the cell.
Cytosol
No cell wall
animal cell
Animal cells shape
and sizes vary greatly
from irregular shapes
to round shapes
ANIMALL CELL
cell wall is made
up of cell
membrane and
cellulose
Plant cell
similar in shape
with most cells
being rectangular
or cube shaped
Plant cell
