cell physiology: cell structure and function identify and explain the various cell processes that...
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Cell Physiology:
Cell StructureAnd
Function
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Identify and explain the various cell processes that take place with regards to cell boundaries.
1. Explain the cell theory and the researchers contributions.
2. Distinguish between prokaryotes and eukaryotes. Describe the anatomy & physiology of all cell components.
Objectives
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Humans have an estimated 10 trillion cells.
There are more bacterial cells in the body than human cells.
Your skin loses about 30000 to 40000 dead skin cells from the surface almost every minute!
The largest known cell is an unfertilized ostrich egg cell.
If you unraveled all your chromosomes from all your cells, the strands would stretch from Earth to Moon ~ 6,000 timesC
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1. Robert Hooke– 1665– English scientist
– Observed cork under microscope
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Cork Activity
Cork oak tree
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It reminded him of small rooms in which monks lived…so he named them . . .
He said cork consisted of “great many little boxes”.
CELLS
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1674 18381665
Robert HOOKE Anton van LEEUWENHOEK *created lenses (275x)*first to observe living organisms *observed bacteria and sperm cells (animalcules) *father of microbiology
Matthias Jakob SCHLEIDEN*botanist *cell theory - all plant parts are made of cells *very odd man; shot himself in the head; saved by a friend and lived to study cells
History of the Cell
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18551839
Theodor SCHWANN
*cell theory - all living things are composed of cells
*set foundation of modern histology
Rudolf Ludwig Karl VIRCHOW
*cell theory - all cells come from preexisting cells
*father of pathology
*created a standard procedure for autopsies
Life is Cellular
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Video from: http://ed.ted.com/lessons/the-wacky-history-of-cell-theory
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1. All living things are composed of cells
2. Cells are the basic units of structure and function in all living things.
3. ALL cells come from preexisting cells.
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1.SHAPE – • The shape of the cell is based on the
function the cell needs to perform.
Structure = Function
• Different types of cells have different shapes.
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Based on the following cell shape,what do you think the function is?
Cell Diversity
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2. SIZE –Cells vary in size from
macroscopic to microscopic
Cell Size Demo: See lab handout
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Size examples
Ostrich egg
What is the largest cell???
The smallest cells = bacteria
Microscopic cellsMacroscopic cells
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3. INTERNAL ORGANIZATION:
• cells contain organelles to organize their inside material
• Organelles= tiny organs
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prokaryote Eukaryote
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Prokaryotes vs. Eukaryotes Chart
Fill in what you know with a partner. Have at least 5 points for each and an example. You may use
your notes and textbook.