cells in action. diffusion movement of particles from areas of high concentration to areas of low...
TRANSCRIPT
Cells in Action
• Diffusion• Movement of particles from areas of high
concentration to areas of low concentration• Osmosis• The diffusion of water through a
semipermeable membrane• Semipermeable means only certain
substances can pass through
Permeable
Semipermeable
Nonpermeable
Cell Energy• Photosynthesis• Process by which plants use sunlight to make food• converts carbon dioxide and water into glucose and
oxygen• 6CO₂ + 6H₂O C₆H₁₂O₆ + 6O₂
• Cellular Respiration• Process by which plants use oxygen to
produce energy
Sun’s energy
Cell Energy• Photosynthesis
• 6CO₂ + 6H₂O C₆H₁₂O₆ + 6O₂
• Cellular Respiration• Process by which plants use oxygen to
produce energy• C₆H₁₂O₆ + 6O₂ 6CO₂ + 6H₂O + Energy
Sun’s energy
CO₂ + H ₂O
C₆H₁₂O₆ + O₂
ATP
LightEnergy
Photosynthesis
Cellular Respiration
Cell Energy• Fermentation• Bacteria in yeast cause CO₂• This makes bread rise
• Running • Caused by a lack of oxygen• Muscles build up lactic acid• Cause a burning in the muscle
The Cell Cycle• The life of a cell is called the cell cycle• The cycle begins when the cell is
formed• The cycle ends when the cell divides to
form new cells• Prokaryote divide in a process called
binary fission• Eukaryotic cells divide to form two
identical cells in a process called mitosis
The Cell Cycle
• Before dividing DNA is copied• DNA forms into chromosomes• Chromosomes are two exact
copies of the DNA• There are 23 pairs or 46
chromosomes in humans• Potatoes have 24 and 48
The Cell Cycle• Chromosomes are two exact
copies of the DNA• There are 23 pairs or 46
chromosomes in humans• Potatoes have 24 and 48• Ophioglossum reticulatum
has 1,260 chromosomes• Plants cells divide differently because of
their cell wall• The form a plate between the two new
cells