Unit 2: Cells. Students will understand that the organs in an organism are made of cells that have structures & perform specific life functions
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1 Unit 2: Cells Students will understand that the organs in an organism are made of cells that have structures & perform specific life functions
2 Vocabulary Cell Chloroplast Tissue Cell wall Organ Lysosome System Cytoplasm Nucleus Osmosis Diffusion Endoplasmic Reticulum Vacuole Mitochondria Ribosomes Membrane
3 Cells How big are cells? What is in a cell? How are these tiny things responsible for life functions? What is it they actually do? Are there cells with specific functions which differ from other cells?
4 Cells Are Awesome!
5 Cells Are Make of Organelles
6 Organelles Little organs Specialized, work together to make cell work as a whole
7 Organelles Cell wall Cell membrane Nuclear membrane Nucleus Nucleolus Mitochondria Endoplasmic reticulum Ribosomes Golgi bodies Chloroplasts Vacuoles Lysosomes Cytoplasm
8 Plant Cells vs. Animal Cells Different Shape Plant cells are usually rectangular Animal cells do not have a definite shape
9 Plant Cells vs. Animal Cells Different Structures Plant Cell Cell wall Chloroplast Large vacuole Animal Cell No cell wall Lysosomes No chloroplast
10 Bacteria vs Plant & Animal What makes bacterial cells different from plant or animal cells? Size bacteria are much smaller Nucleus bacteria don t have one Some bacteria have a cell wall
11 Prokaryotic vs. Eukaryotic Prokaryotic-no nucleus Bacteria Eukaryotic-nucleus Plants, animals, fungi
12 Organelles Make a chart in your notes about organelles. List the organelles, what it does, and if it is in a plant and/or animal cell.
13 Cell Wall Provides support and protection Allows water, carbon dioxide, and oxygen to pass in and out of cell Only in plant cells Cell Wall
14 Cell Membrane Supports and protects cell Controls what goes in and out of cell In both plant and animal cells Surrounds the outside of animal cells Inside cell wall in plant cells Cell Membrane
15 Nucleus Brain of cell, controls cell s activities In plant and animal cells Nucleus
16 Nuclear membrane Protects nucleus Controls what moves in and out of nucleus In plant and animal cells
17 Nucleolus Contains the chromosomes, which contain DNA Plant and animal cells
18 Mitochondria Breaks down sugar molecules into energy mighty mitochondria makes energy Plant and animal cells
19 Endoplasmic Reticulum Carries materials through cell Plant and animal cells
20 Ribosomes Produces proteins Plant and animal cells Ribosomes
21 Vacuole Stores food, water, and wastes Plants have large vacuoles Animals have small vacuoles
22 Chloroplasts Contains chlorophyll Uses carbon dioxide, water and light energy from the sun to create food for the plant Photosynthesis Only in plants
23 Lysosomes Breaks down food and wastes In animal cells, sometimes in plant cells
24 Organelles On pg 20, draw a plant cell and an animal cell. Be sure to include all the organelles listed List the name and function of the organelles COLOR IT (30 pts)
25 Specialized Cells Are all the cells in our body, or another animal s body, identical? Do they all do the exact same thing? In multi-celled organisms, cells are most likely organized into tissues Those tissues are organized into organs Those organs are organized into systems
26 Organelles Cells Tissues Organs Systems Organism
27 Examples Nucleus Nerve Cell Nervous Tissue Brain Nervous System Human
28 Examples Mitochondria Muscle Cell Muscle Tissue Bicep Muscle Muscular System Carmelo Anthony
29 Movement In & Out How do substances move into and out of a cell? Diffusion is the movement of particles (tiny) into and out of a cell based on the gradient The gradient means that particles travel FROM and high concentration TO a low concentration
30 Movement In & Out High salt (NaCl) Low salt
31 Osmosis Diffusion or movement of WATER from an area of high concentration to an area of low concentration. WATER ONLY Vital to life and all living things
32 Active Transport Movement of particles too large to use diffusion or osmosis Requires assistance to get in or out May require energy from the cell Against the gradient
33 Movement In & Out Osmosis is the diffusion of water into or out of a cell (think water-logged versus dehydration) Low water Lots of water
34
35
36 Cells on the Computer Go to: econdary/7thgradewebresources.htm Explore through the last 7-8 activities. Some links are broken, just move to another one.
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