Allyssa Crawford, Kassandra Spady

"Cells", "Cell Structure"

Cell Organelles

  • Chromosomes- Usually in the form of chromatin it contains genetic information. It is composed of DNA. Also it is thicken for cellular division.
  • Nuclear Membrane- This surrounds the Nucleus, composed of two layers, has Numerous openings.
  • Nucleolus- This is a spherical shape. when the cell is not divided it is visible. Contains RNA.
  • Chloroplast- usually found in plant cells. contains green chlorophyll where photosynthesis takes place.
  • ER-Goes through cytoplasm onto the cell membrane.
  • Golgi body- a membrane found near the nucleus.
  • mitochondria- energy of the cell
  • lysosomes- digestive plants for proteins.
  • ribosomes- each cell contains thousands. composes 25% of cell's mass.
  • cell wall-commonly found in plant cells, extremely elastic.
  • vacuoles-contain water solution. Membrane-bound sacs for storage, digestion, and waste removal.

Lipid Bilayer

Major component of the membrane.

Transport proteins that go through the membrane to allow things to go in and out.

Cell Transport

Active Transport-The movement of a chemical substance through a gradient of concentration or electrical potential in the direction opposite to normal diffusion, requiring the expenditure of energy.

Passive Transport- The movement of a chemical substance across a cell membrane without expenditure of energy by the cell, as in diffusion.