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CELLS :confetti_ball: :tada: :smiley: (Organelles (Present in both Animal…
CELLS :confetti_ball: :tada: :smiley:
Membrane systems
Present on both animal and Plant cells
Cell Surface Membrane
Structure
Thin partially permeable membrane that surrounds the cytoplasm
Function
To separate the inside of the cell from its surroundings
To keep toxic substances out of the cell
To control the movement of substances in and out of the cell
Keep cell content in one place
Cytoplasm
Structure
Is the part of the protoplasm between the cell surface membrane and the neucleus
Contains enzymes and a suspension of specialized structures called organelles
Function
To support and suspend organelles and other things in the cell
To allow movement in the cell
Maintain the general shape of the cell
To allow materials to pass easily from one organelle to another
Nucleus
Function
controls cell activities such as growth and repair of worn-out parts
Involved in cell division
Structure
Small spherical structure surrounded by a nuclear envelope
Contains genetic material in the for of chromatin
Chromatin
Structure
Network of long thread-like structures
Made up of proteins and deoxyribonucleic acid (DNA)
Function
Control cell division
Condense to become chromosomes
Organelles
Present in both Animal Plant cells
E
ndoplasmic
R
eticulum (ER)
Rough ER
Structure
Outer surface appears rough and is continuous with nuclear envelope
Ribosomes attached to outer surface
Function
Transports proteins made by ribosomes to Golgi apparatus for secretion out of cell
Smooth ER
Structure
More tubular than RER and may or may not be connected to RER
Function
Makes substances such as lipids and steroids
Converts harmful substances into helpful materials (detoxification)
Free Ribosomes
Structure
Consists of 2 major subunits
Small round structures that are either attached to RERs or lie freely in the cytoplasm
Function
Involved in protein synthesis (Free ribosomes make proteins that are used
within
the cell, ribosomes attached to RER make proteins for secretion
out of cell
)
Golgi Apparatus/ Golgi body
Structure
Shaped like a disc
Consists of stacks of flattened spaces surrounded by membrane
Vesicles can be seen fusing with one side of Golgi apparatus and pinching off on opposite side
Function
stores and modifies substances made by ER
Vacuoles
Function
Store substances within cell
Structure
Fluid filled space enclosed by membrane
Animal cell: many small vacuoles that contain water, food substances and enzymes- (digestive enzymes to digest invading bacteria); usually exist temporarily
Plant cell: large central vacuole containing cell sap (nutrients- sugars, amino acids, mineral salts, wastes, poisonous substances that deter animals from feeding on plant parts) enclosed by a tonoplast (partially permeable)
Mitochondrion (singular) Mitochondria (plural)
Structure
Sausage-shaped like organelle
Double membrane with inner membrane folded
Function
Site of respiration to release energy from food which is used by cell for growth and reproduction
Present in only Plant cells
Cell Wall
Function
Protects the cell from injury and gives plant cell structure and support
Structure
Cell wall is fully permeable
Rigid wall made of cellulose
Chloroplasts
Structure
Oval structures
Contain a green pigment called chlorophyll
Function
Carry out photosynthesis
Chlorophyll traps light energy in photosynthesis to make organic molecules (glucose) and free oxygen from carbon dioxide and water