Unit 3 Cell Structure and Function

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Presentation transcript:

Unit 3 Cell Structure and Function Section 7.1 Cell Theory

1) What is a cell? 2) What does the nucleus do? 3) What is a eukaryote and prokaryote?

Discovery of the Cell 1665: Robert Hooke identified dead plant cells, and named the “cell” 1673: A. Leeuwenhoek is the 1st person to observe living cells

Germany 1839: all organisms made of cells. Matthais Schleiden (Plants) Theodor Schwann (Animals) Germany 1839: all organisms made of cells.

Rudolf Virchow (Germany 1858): all cells come from cells.

The Cell Theory All living things are composed of one or more cells Cells are the basic unit of structure and function in organisms All cells come from the reproduction for pre-existing cells

Cell Diversity All cells have different shapes, sizes, and functions The size and shape of a cell will relate to its ___________

Cell Diversity Size: Shape: Cells are limited by their outer surface area and volume Shape: The shape relates to the cell function Nerve cells

Red and White Blood Cells

Cell Diversity Internal Organization: Organelle: cell components that performs ____________ for the cell Will maintain life for the cell Cell is surrounded by a ___________ Each organelle has its own membrane Nucleus:

Cell Diversity Eukaryotes: organisms that contain a membrane-bound nucleus and organelles Animal cells Prokaryotes: unicellular organisms that lack membrane-bound nucleus and organelles bacteria

Compare and Contrast the Eukaryotic and Prokaryotic Cell Cell membrane Cytoplasm Prokaryotic Cell Nucleus Eukaryotic Cell Organelles

Eukaryote and Prokaryote

Cell Biology 4/22/2017 G. Podgorski, Biol 1010

Bacteria Magnified Bacteria on the tip of a pin

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