Transcript cells

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These structures are called Organelles.
....they actually do work for the cell, by
carrying out life functions.
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Organelles vary in size
They became visible to
the scientist with the
advancement of
scientific technique and
equipment.
Ex.) compound light microscope,
electron microscope and
centrifuge
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Just like the Organs of your body, organelles
work together to perform specialized
functions that help maintain HOMEOSTASIS
within the cell.
Homeostasis is a balance or steady state both
inside and outside the cell
that helps an organism to survive.
Failure of homeostasis is known as disease!
Day 2
Which sequence of terms is in the correct order
from simplest to most complex?
1. cells → tissues → organs → organ systems
2. tissues → organisms → cells → organ
systems
3. cells → tissues → organ systems → organs
4. organs → organisms → organ systems →
cells
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cell
tissue
organ
system
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4.
The cell membrane forms a boundary that
separates the cellular contents from the
outside environment.
The cell membrane is capable of receiving
and recognizing chemical signals.
The cell membrane forms a barrier that
keeps all substances that might harm the
cell from entering the cell.
The cell membrane controls the movement
of molecules into and out of the cell.
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Semi-permeable
(selectively permeable)
membrane (covering)
Protects the inside of
the cell from the
outside environment
Controls what
molecules enter and
exit the cell
Recognizes chemical
signals
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Shows the parts of the cell (plasma)
membrane: lipid bi-layer (bi=2), proteins
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Allows small molecules to pass into the cell
ex.) gases (oxygen, carbon dioxide)
glucose (simple sugar)
Prevents large molecules from entering or
exiting the cell
ex.) starch
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Proteins allow large, charged and odd shaped
molecules to enter and exit the cell.
They also serve as receptor and recognition
proteins for chemical signals (life function:
REGULATION)
Located near the
center of the
cell
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Contains
genetic material
in the form of
chromosomes
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Allows transfer
of this DNA
during
REPRODUCTION
(life function)
*Nucleolus located inside nucleus and it makes ribosomes.
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Jelly-like material
inside the cell that
is eighty percent
water
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Hold the organelles
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Moves materials
around the cell
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Chemical reactions
take place here
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Small membrane bound
organelle where
cellular respiration takes place.
Cellular Respiration is the process that
converts food energy into a usable form or
ENERGY!!!  ATP (Adenosine tri-phosphate)
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Small dense organelle that
serves as the site for
protein production
Can be free in the
cytoplasm or attached to
an organelle known as the
endoplasmic reticulum.
ribosome
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Is the home of
ribosomes (protein
makers)
Transports proteins,
created by
ribosomes, to the cell
membrane where
they will be used or
secreted by the cell.
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Chlorophyll (pigment
in plants) containing
structure
Found in plants and
algae
Where photosynthesis
takes place
* Photosynthesis is the use of SOLAR energy to
combine inorganic molecules (H2O, CO2) to create the
organic molecule, glucose (sugar) .
Located in primarily animal cells
 Involved in the process of cell division
(life functions: growth/reproduction)
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Membrane bound organelle containing
 Water
 Enzymes
 And other substances
Serves as food storage (NUTRITION), nonremovable waste (EXCRETION) or secretion
products.
Lysosome is a special vacuole that aids
in nutrition using enzymes to digest by
merging with food vacuoles.
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Accepts made proteins and transports them
to cell membrane for use inside or outside
the cell.
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Provides structure and support for the cell
Protects the cell
Found mostly in plant cells, made of cellulose
cell wall
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Work like a skeleton for the plant cell!
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organelles
insulin
guard cells
antibodies
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a nucleus
a chromosome
a protein molecule
an enzyme molecule
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cell membrane—storage of
hereditary information
chloroplast—transport of
materials
ribosome—synthesis of proteins
vacuole—production of ATP
Do Now:
State the cell Theory:
All living things are made up of
one (uni-cellular organism) or
more cells (multi-cellular organism).
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Cells are the basic unit of structure and
function in organisms.
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All cells arise from existing cells.
Cellular Diversity
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The process by which a less specialized cell
develops or matures to possess a more
distinct form and function.
State ways in which a single cell organism,
such as an ameba, and a human body cell are
alike.
1.) They contain similar
structures (organelles)
2.) They are the basic unit
that performs life function
for the organism
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Label your cell diagrams
Cell wall
Centrioles
Chloroplast
Shape of cell
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4.
structure
structure
structure
structure
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2
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4
These groups of cells represent
different
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tissues in which similar
cells function together
organs that help to carry
out a specific life activity
systems that are
responsible for a specific
life activity
organelles that carry out
different functions
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A multicellular organism has organ systems that
interact to carry out life functions, while a singlecelled organism carries out life functions without
using organ systems.
A single-celled organism carries out fewer life
functions than each cell of a multicellular
organism.
A multicellular organism always obtains energy
through a process that is different from that used
by a single-celled organism.
The cell of a single-celled organism is always
much larger than an individual cell of a
multicellular organism.
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does not require energy
has energy requirements
equal to those of thyroid
tissue
requires less energy than
thyroid tissue
requires more energy than
thyroid tissue