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Atoms made Elements. Elements make molecules
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Molecules are: Groups of elements held by chemical bonds (compounds)
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Atoms made Elements. Elements make molecules Molecules make Cells Cells make tissue Tissues make Organs Organs make up Organ systems Organ systems make up an Organism
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What are the most common elements in LIVING THINGS?
C,H,N,O,P,S They make cells Basis of organic chemistry
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What are the most common molecules in LIVING THINGS?
Protein Lipid Carbohydrates Nucleic Acids
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Proteins Molecules made of amino acids
Build and repair body structures Create enzymes
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Lipids “fat” molecules Store energy (oils, waxes, fats)
A PHOSPHOLIPID: a molecule of phosphorous and lipid which is the main building block for cell membranes
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Carbohydrates Sugars, starches, fibers Energy storage and release
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Nucleic Acids Cell’s genetic information is stored within
Made of nucleotides DNA is a common type
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DNA
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Atoms and elements can make up cells
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Cells: the smallest basic units that can preform all life processes
Cells are made of atoms They make everything an organism needs for survival
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CELL THEORY
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Phagocytosis cytoplasm engulfs large particles
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2 types: Eukaryotes vs. Prokaryotes Multicelluar vs Unicelluar
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Prokaryote: a single celled organism
Prokaryote: a single celled organism. Does not have a nucleus or organelles (ex./ bacteria & archea)
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Eukaryote: an organism made of cells which have a nucleus and organelles (ex:/ animals, plants, fungi, protists)
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ORGANISM A living thing; anything that can carry out life processes independently
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CELL THEORY 1665: first cells observed recorded . Named “cells”
1673: Van Leeuwenhoek observed single celled organism in pond water, and observed cells in blood using a microscope 1839: Schwann and Schleiden observed plants and animals made of cells. Proposed all living things are made of cells 1858: Rudolph Virchow observed cell division and proposed all cells come from other cells and cell processes.
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Cells are small Transportation of materials is easy when
you have a large surface to volume ratio
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Cell Membrane Phospholipid layer that covers the cell’s surface Provides protection for the cell Allows the active and passive transport of materials in and out Outerlayer; Acts as a barrier between the inside and outside of a cell Semi-permeable
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Cytoplasm The area inside the cell, including the (watery-medium) fluid located inside the membrane around the organelles
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NUCLEUS The center of an atom: containing protons and neutrons
The membrane-bound organelle in a cell which contains the genetic material (DNA). It has a role in such processes as growth, reproduction and metabolism.
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Ribosomes Follows DNA as a code Uses amino acids Synthesizes Proteins
(found in eukaryotes and Prokaryotes)
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Eukaryotic cells are bigger and more complex
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Golgi Complex receives protein/lipids sorts, packages, and ships them inside and out of the cell
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Endoplasmic Reticulum Smooth- no ribosomes, makes lipids, breaks down toxins Rough- ribosomes (synthesize protein)
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Mitochondria double membrane organelle with matrix releases energy stored in food CELLULAR RESPIRATION
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Lysosomes digests cell waste
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Cytoskeleton fibers/filaments help support cell help movement of cell
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Cell Walls
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Large Centriole Vacuole
Large in plants, small in animals Lots of water, supports the cell
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Chloroplasts Contain chlorophyll (photosynthesis: using the Sun’s energy to create energy As glucose sugar)
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Compare/ contrast Animal vs plant Eukaryote vs Prokaryote
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Nucleolus: synthesizes ribosomes
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Cells make Tissues Cells are specialized
Groups of specialized cells work together as a tissue: Epithelial- protective tissue (Integumentary) Connective- hold other tissues together, can expand and contract Muscle- muscles and bones. Helps protect organs. Allows movement and structure of body nerve tissue- spine, brain and central nervous system
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Tissues make up Organs
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Organs make up Organ Systems
Circulatory system Digestive system Skeletal system Muscular system Excretory system Reproductive system
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Organ Systems make up an organism
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