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Bio chapter 7 vocab

QuestionAnswer
Cell- basic units of life
Cell Theory- fundamental theory of biology that states cells are the smallest base of life
Cell Membrane- thin flexible barrier surrounding the outside of the cell
Nucleus- large membrane enclosed structure that contains DNA, and controls the cell
Eukaryote- cells that enclose their DNA in nuclei
Prokaryote- cells that don’t enclose their DNA in nuclei
Cytoplasm- portion of the cell outside the nucleus
Organelle- different structures within the cell
Vacuole- large sac like membranes that act like trash cans
Lysosome- small organelles filled with enzymes
Cytoskeleton- protein filaments that are set up to give the cell its shape
Centriole- help organize cell division
Ribosome- small particles of RNA in the cytoplasm
Endoplasmic Reticulum- internal membrane where lipid components are assembled
Golgi Apparatus- flattened membranes that move proteins
Chloroplast- solar powered organelle that produces food for plants
Mitochondrion- organelle that converts sugars and proteins into energy
Cell wall- strong thick membrane that acts a structure
Lipid Bilayer- strong structure that protects cells from the outside
Selectively Permeable- the cell can pick and choose what substances can pass through the membrane.
Diffusion- when particles move from high pressure to low pressure
Facilitated diffusion- when particles cant pass through the membrane but go through small passages
Aquaporin- water channels in the membrane that allow water to freely pass through it
Osmosis- the diffusion of water through a selectively permeable membrane
Isotonic- "same strength"
Hypertonic- "above strength"
Hypotonic- "below strength"
Osmotic pressure- the net movement of water in or out of a membrane produces force
Homeostasis- constant internal physical and chemical conditions
Tissue- a group of similar cells that performs a particular function
Organ- many groups of tissues sometimes come together to perform a function
Organ system- a group of organs that come together to perform a task
Receptor- a membrane type part of a cell that receives signal
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