Details Title: #1 Description: first cards Total Flash Cards: 39 Created: 09/24/2009 10:03:14		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Biology Flashcards
Cards in this set: Term centrioles Definition organize movement of chromosomes in cell division Term cytoplasm Definition jelly-like composed mostly of water seperates the nucleus from the cell membrane all other organelles are found here made up of cytoskeleton to form the cell's shape Term endoplasmic reticulum Definition sacs that are used to transport, manafacture, and process chemical compounds to be used by the cell provides a pathway throughout the cell from the nucleus to the membrane Term golgi assparatus Definition stack of membranes that collets and modifies chemical compounds packages and distributes the molecules that are produced in one part of the cell but used by another part Term lysosomes Definition contain special organelles and enzymes and chemicals that are brought into the cell break down old cells Term mitochondrian Definition powerhouse of the cell, that converts nutrients into energy that can be used by the cell Term nuclear envelope Definition protects the nucleus of the cell pores allow molecules to move in and out of it Term nucleolus Definition found inside the nucleus contains rna and synthesis rybosomes Term nucleus Definition control center of the cell directs the cell's activities dna is contained here Term plasma membrane Definition a bi layer surrounding the cell regulates what enters and leaves the cell Term ribosomes Definition found on rough er tiny structures that synthesize proteins Term vacuole Definition sac-like structures that store water,salts,carbohydrates,proteins dispose waste products frum the cell Term vesicles Definition small packages that are created by the golgi assparatus deliver nutrients and proteins throughout the cells or tranports wastes to the cell membrane to be expelled from the cell Term cell wall Definition outermost layer that surrounds the plasma membrane Term chloroplasts Definition converts the radial energy into chemical energy for photosynthesis Term plastids Definition small structures that can store food and chloroplasts Term Cell theory Definition a fundamental concept of biology -All living things are made of cells -Cells are the basic units of structure and function in living things -New cells are produced from existing cells Term Eukaryotes Definition cells that contain nuclei. Term Prokaryotes Definition - cells that do not contain nuclei. Term Organelles Definition specialized structure that performs important cellular functions within a eukaryotic cell. Term Chromatin Definition granular material visible within the nucleus; consists of DNA slightly coiled around proteins Term Chromosomes Definition threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next. Term Ribosomes Definition small particles of RNA and protein found throught the cytoplasm. Term Concentration Definition the mass of solute in a given volume of solution, or mass/volume Term Diffusion Definition process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated. Term Equilibrium Definition when the concentration of a solute is the same thru ought a solution. Term Osmosis Definition - the diffusion of water through a selectively permeable membrane. Term Isotonic Definition when the concentration of two solutions is the same. Term Hypertonic Definition when comparing two solutions, the solution with the greater concentration of solutes. ”Above strength” Term Hypotonic Definition - when comparing two solutions, the solution with the lesser concentration of solutes. ” Below strength” Term Facilitated diffusion Definition movement of specific molecules across cell membranes through protein channels. Term Active Transport Definition energy- requiring process that moves materials across the cell membrane against a concentration difference. Term Endocytosis Definition process of taking material into the cell by means of enfolding, or pockets, of the cell membrane. Term Phagocytosis Definition process in which extensions of cytoplasm surround and engulf large particles and take them into the cell. Term Pinocytosis Definition process by which a cell takes in liquid from the surrounding environment. Term Exocytosis Definition process by which a cell releases large amounts of material. Term Cell Specialization Definition the process in which cells develop in different ways to perform different tasks. Term Organ Definition group of tissues that work together to perform closely related functions Term Organ systems Definition group of systems that work together to perform closely related functions.