Entrance Assessment With the materials located in front of you.... Create a diagram of the cell membrane Be able to label/point to the main components of the cell membrane Label the hydrophilic and hydrophobic molecule components Answer the question on your paper: What is the function of the cell membrane?

Lesson Objectives 10/18 Be able to identify mitochondria, chloroplasts and the ribosomes in a cell. Be able to describe the above organelle’s functions. Human Bone Cells

Mitochondria Powerhouse of the cell, providing most of its ATP supply ATP: molecule that most cells use as energy Contain their own RNA and DNA and are able to reproduce themselves Endosymbiosis theory Cells contain multiple mitochondria

Mitochondria Two membranes: Inner Outer Contains long folds known as cristae Increase surface area for greater space for chemical reactions to occur Outer

Chloroplasts Much like mitochondria: Contain DNA Surrounded by 2 membranes Convert energy from the sunlight into chemical energy Photosynthesis Contain large amounts of green pigment: Chlorophyll

Ribosomes Site of protein synthesis Synthesis=creation Translates the genetic information from RNA into proteins Each is composed of two subunits one large and one small Ribosomes come in two forms: Free floating Attached to the rough endoplasmic reticulum (more to come)

So in review Can you….. Identify mitochondria, chloroplasts and the ribosomes in a cell. Describe the above organelle’s functions.

Lesson Objectives 10/19 Be able to identify the endoplasmic reticulum and golgi apparatus in a cell. Be able to describe the above organelle’s functions.

Endoplasmic Reticulum Found around the nucleus Also known as “ER” Smooth No ribosomes Rough Contain ribosome Function: Transport, "intracellular highway". Ribosomes are positioned along the rough ER, protein made by the ribosomes enter the ER for transport.

Golgi Apparatus May be called Golgi complex or Golgi body Flattened stacks of membranes Works close with the ER Processes, packages and secretes proteins. Like a factory

Unprocessed proteins enter the Golgi apparatus from ER Proteins are packaged and exported near membrane

Organelles that Store, Clean Up and Support Lesson Objectives: Recognize and describe the functions of the vacuoles, lysosomes and the cytoskeleton.

Vacuoles Large, saclike, membrane-enclosed structures Function is to store materials like water, salts, proteins, and carbohydrates.

Lysosomes Small organelles filled with enzymes Break down lipids, carbohydrates, and proteins into small molecules that the cell can use. Break down organelles that have outlived their usefulness. Remove “junk”

Cytoplasm Jell-o like substance: Cytosol The area between the cell membrane and the nucleus Contains structures in the cell Organelles Cytoskeleton The framework of the cell Contains microtubules and microfilaments Aid in movement and support the cell

Microtubules Centrioles: Cilia and Flagella: A type of microtubule Located near the nucleus and help organize cell division. Centrioles are not found in plant cells Cilia and Flagella: Projections from the cell surface Enable cells to swim through liquid