Download Chapter 1.3 cell processes_1

1.2Cells
• unicellular.- one cell
• Multicellular-many celled more complex and
performs specialized jobs
• Cells of the same kind make tissues ..
• Tissues of the same kind make organs
• Organs work together to make organ
systems..
• organ systems make the organelle
Chapter 1.3 and 1.4 Cell Processes
pps. 22-27
Elements and Compounds
• Elements: any substance that cannot be
broken down into a simpler substance
(smallest part is an atom)
• Compounds: two or more elements
chemically joined together
• smallest part of a compound is molecule
• 1 C and 2 O CO2
What compounds do cells need to
survive? Pg. 24
• What are organic compounds? Compounds
that contain carbon .
• What are some organic compounds?
Carbohydrates, lipids, proteins, nucleic acids
What is a carbohydrate? Energy rich organic
foods made up carbon, hydrogen, oxygen.
Potatoes, rice, sugar, pasta, bread,
Lipids
• Made of carbon, hydrogen and oxygen. The
cell membrane is made of lipids. Fats and oils
and waxes are all lipids our bodies store for
later use.
• Proteins : made of carbon, hydrogen,
• Oxygen, nitrogen, and sulfur. Great
for increasing the cell’s functions and
speeding up the enzymes for metabolism.
Nucleic Acids
• Long strands of organic molecules that contain
information for cells to carry out life’s
processes. DNA molecule
DNA is shaped like a double
Helix ( a rope twisted) and
found in a cell’s
Nucleus. There are chemical
Codes on the rope ends.
Water and Living things
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Water does three things for our bodies:
Chemical reactions depend on it
Helps cells keep their shape
Changes the temperature slowly in an
organism
1.4 The cell and its environment
• The cell has a
• to allow substances to move in and out of the
membrane. It has a double layer of lipid
molecules side by side.
• The cell membrane is
• Selectively permeable.
• Video of processes
Passive Transport: Diffusion and
Osmosis
• The movement of material across a
membrane with no energy is called passive
transport.
• Two types: diffusion and osmosis
• Diffusion: high concentration to a low
concentration
• video
Osmosis
• Osmosis: Diffusion of water across a cell
membrane
• Video
• Active Transport: Molecules move from a
lower concentration to a higher concentration
• This requires energy
• Video of active transport
Moving Large Particles
• Video of endocytosis
• Video of exocytosis