"Little eels, or worms, lying all huddled up together and wriggily, and the whole water seemed to be alive with these animalcules filled with juices."

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Presentation transcript:

"Little eels, or worms, lying all huddled up together and wriggily, and the whole water seemed to be alive with these animalcules filled with juices." -- Anton van Leeuwenhoek's observations of a drop of pond water, as he stared through the eyepiece of his newly built microscope in 1673 Chapter 7

Prokaryote vs. Eukaryote Prokaryote – Bacteria no membrane-bound organelles plasma membrane Eukaryote – Found in plants, animals, fungus, and protists (everything except bacteria) Membrane-bound organelles and a nucleus that contains DNA

The Animal Cell

Plant Cell

Cell Membrane – regulates transport of materials (nutrients in & waste out) made of lipids (fat) Selective permeability – controls how much comes in or out based on the cells needs Water Loving Water Hating

Channel Protein Marker Protein Receptor Protein Three types of proteins are found in the cell membrane 1. Channel proteins - let stuff in and out of the cell (transport of materials) 2. Receptor proteins – transfer information to the cell about its surroundings 3. Marker proteins – (organ transplants) name tags for cells allowing them to recognize each other Fluid Membrane

Organelles – Organs for cells Nucleus Controls all cell activities Contains DNA Cytoplasm thick slimey fluid that fills up the cell In constant motion See cytoplasmic streamingSee cytoplasmic streaming Cell Wall (Not in animals) Gives plant cells a rigid shape Helps to support a plant What do animals have instead of a cell wall?

Endoplasmic Reticulum (ER) Transportation Two kinds: Rough and Smooth Rough has ribosomes Ribosomes Make Proteins Everything in your body is made of or by proteins

Golgi bodies Storage and packaging Mucous, and Saliva Mitochondria Convert sugar into energy usable to the cell Where in your body would you need a lot of mitochondria?

Chloroplasts Contain chlorophyll Make food from sunlight Vacuoles Storage (for food and water) What cells might have bigger vacuoles? Plant cells have big vacoules why???

Movement Cilia –Short projections that look like hair –Can be used for movement or to absorb Flagella –Longer and less in # –Create movement with whiplike motion

Channel Protein Marker Protein Receptor Protein Mitochondria Nucleus Golgi BodyChloroplast Endoplasmic Reticulum

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