Biology Unit Unit C: From Life to Lifestyle

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Presentation transcript:

Biology Unit Unit C: From Life to Lifestyle Science 14 and 10-4 with Mrs M

Biology Unit C: Life to Lifestyle Chapter 8: Structure and Function of Plant and Animal Cells Chapter 9: Life Functions Common to Living Things Chapter 10: Food for Life Chapter 11: Maintaining Homeostasis (with Mr. Watts)

8.1 A Closer Look at Cells We will be looking at the question: How do cells, which are microscopic and invisible to the naked eye, work together in organs and organ systems to carry out life functions?

Microscope A microscope is an optical instrument used for viewing small objects Red blood cells

Compound Microscope Uses light

Preparing a slide Materials: glass slide medicine dropper slip cover tweezers

Compound Microscope Uses light

Binocular = 2 eyepieces Monocular = 1 eyepiece

Objective Lenses: As you increase the magnification the specimen appears larger 4x 10x 40x 100x

Magnification

Electron Microscope Uses beam of electrons

Electron Microscope Uses beam of electrons

2 types of Electron Microscope 1. TEM: transmission electron microscope Focuses a beam of electrons at a very thin slice of the object under study Object is covered in chemicals and is placed in the vacuum-sealed part of the microscope Specimen must be dead to observe it

TEM: high resolution (1nm) Bacteria https://www.youtube.com/watch?v=fToTFjwUc5M

Electron Microscope 2. SEM: scanning electron microscope Beam of electrons is passed over the specimen being observed Creates a 3D image on the computer screen Can examine living things

SEM

‪The World's Most Powerful Microscope - KQED QUEST‬ https://www.youtube.com/watch?v=sCYX_XQgnSA The hidden world around us documentary https://www.youtube.com/watch?v=_h8cr6cgjAg

8.2 Cell Theory

Living or Non-living? Examples of living things: Non-living things: Viruses, bacteria, insects, plants, animals Non-living things: Ice grows, is it living? Rocks can be moved, are they living? It is living if it: Grows Reproduces Moves or has transportation

Organelles: little “organs” or parts inside cells Cell: Smallest unit of life Tissues: cells combined to work together Organ: combined tissues to perform specialized task Systems: like respiratory, cardiac, digestive systems Organism: living multi-cellular being

Cell Theory All living things are made up of cells Cells are responsible for structure and function All cells are reproduced from other living cells

8.3 Plant and Animal Cell Structures

Animal Cell

Animal Cell

8.4 Cell City

Cell as a hockey rink analogy Boards = Cell membrane keep crazy fans or bad bacteria out Ribosomes= Little red face off dots Tiny protein-making factory Mitochondria = Power Play Forwards Lysosome: Net where pucks disappear Referee = Nucleus Puck = Nutrients and messengers passed around Cytoplasm = Ice

review Key terms: microscope (compound and electron), cell, organelle, living, nonliving, tissue, organ, system, nucleus, mitochondrion, cytoplasm, cell membrane, cell wall, chloroplast 3ab, 6, 8, 10, 11

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