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Plasma Membrane. Cells must control the materials that enter and leave. The PM is the . Homeostasis. Homeostasis is the process of maintaining the . Selective permeability is the process where a cell allows into the cell and . PM Structure. PM is made of a phospholipid bilayer
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Plasma Membrane • Cells must control the materials that enter and leave. • The PM is the
Homeostasis • Homeostasis is the process of maintaining the . • Selective permeability is the process where a cell allows into the cell and .
PM Structure • PM is made of a phospholipidbilayer • Two phospholipid layers • Hydrophilic – “” water • Hydrophobic – “” of water
Transport across the PM • Fluid Mosaic Model • Transport Proteins
Cell Wall • that provides the cell and • Located right next to the cell membrane • Think and membrane
Control Centers The Nucleus and Ribosomes
Nucleus • The nucleus contains the for the cell • Chromatin • Double membrane • Nuclear pores
Ribosomes • Ribosomes control • Made by the nucleolus • Found floating freely in the or on the rough endoplasmic reticulum
Assembly, Transport & Storage Other organelles
Endoplasmic Reticulum • Site of in the cells • ER • Covered in ribosomes • ER • No ribosomes
Golgi Apparatus • and products of the ER • Sends packaged proteins to various locations around the cell • Uses . as packaging
Vacuoles & Lysosomes • Vacuoles are used in of materials • Plant cells have vacuole while animal cells have many smaller vacuoles • Lysosomes contain enzymes that break apart cellular waste for re-use
Cellular Energy Chloroplasts and Mitochondria
Chloroplasts • Capture energy and produce to store • Type of plastid (storage) • Contains • Traps light energy • Green
Mitochondria • for the cell • Found in plant animal cells • Double membrane • Increased surface area for reactions
Cytoskeleton • Interior network of support in cells • Criss-crossed web of small “support beams”
Locomotion • Short hair-like projections that move in a wave-like fashion • Long whip like “tails” • Found only in organisms