Cellular Organization

1
Cellular Organization

• Cytology

2
Cell Theory

• Cells make up all life.
• Cells come from pre-existing cells.
• Smallest living unit.
• Maintain homeostasis.

3
Cell Membrane

• What it does
• Lets things in/out
• Reacts to changes -- structural support
• What its made of
• Phospholipid bilayer??
• Proteins (maintain structure, help transport
  food/wastes)

4
2 kinds of Cells

• 1. Sex cells??
• 2. Somatic Cells??
• Body has trillions of cells in different shapes
  and sizes.

5
Mitochondria

• Where ATP (energy) is made.
• 2 steps to make ATP
• 1. glycolysis glucose -gt pyruvic acid
• 2. Kreb pyruvic acid -gt ATP

6
DNA

• In the nucleus determines how you look
• Made of nucleotides S,P,N
• 4 Nitrogenous bases A,T,G,C
• How protein is made DNA-gt RNA -gt protein
• Transcription??
• Translation??

7
Cell Transport

• Cell is selectively permeable (size)
• Diffusion??
• Osmosis??
• Facilitated Diffusion??
• Active Transport??
• Endocytosis
• Exocytosis

8
Cell environments

• Hypotonic watery environment??
• Hypertonic little water in environment??
• Isotonic same amt in/outside of cell??

9
Cell Division

• Mitosis somatic cells, only 1 division
• Meiosis sex cells, 2 divisions
• Leave a big space here because after notes you
  will draw the stages of mitosis and meiosis!!
  (look on page 270-271 and 301)

10
More on cell growth

• Cell growth is regulated by chemicals and genes
• Cancer abnormal cell division that creates a
  tumor.
• Benign will not spread
• Malignant can spread caused by oncagenes