Do Now: hand in online video questions 1. The cell membrane contains channels and pumps that help move materials from one side to another. What macromolecule are they made from? 2. An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes: Water to move into the cell Water to move out of the cell Solutes to move into the cell 3. apple slices are placed in distilled water. Will the apples gain or lose water? 4. orange slices are placed in salty water. Will the oranges gain or lose water

HW Review Osmosis is the movement of ____________ Osmosis is a type of ____________ transport In diffusion (osmosis) ____________ concentrations of substances move to _______ concentrations of substances In osmosis water moves towards or away from salt? What happens to red blood cells when mixed with pure water? Isotonic means more, less, or equal concentrations Explain why a salt water fish would die if pun in freshwater What happens if you put salt on a slug? why?

white blood cell chasing bacteria https://www.youtube.com/watch?v=JnlULOjUhSQ

Lesson Overview 7.4 Homeostasis and Cells

The Cell as an Organism A single-celled, or unicellular, organism does everything you would expect a living thing to do. Eukaryote or Prokaryote

unicellular organisms must achieve homeostasis, relatively constant internal physical and chemical conditions.

The Cell as an Organism Prokaryotes, especially bacteria, are remarkably adaptable and live almost everywhere—in the soil, on leaves, in the ocean, in the air, and even within the human body.

Levels of Organization The specialized cells of multicellular organisms are organized into tissues, then into organs, and finally into organ systems.

Levels of Organization CellTissue Organ Organ system Organism Cell-smallest living thing

Levels of Organization CellTissue Organ Organ system Organism Tissue: group of similar cells that perform a similar function

Levels of Organization cellTissue Organ Organ system Organism Organ: many tissues working together

Levels of Organization cellTissue Organ Organ system Organism Organ system: many organs working together

Levels of Organization cellTissue Organ Organ system Organism= human

diversity of protists https://www.youtube.com/watch?v=Ln69k7LyTsU&t=297s