Cell Structure And Function

CELLS!Structure, Function and Origin

CELLS!

Wednesday, October 21, 2009

What is a CELL?

Assessing prior knowledge:


In this activity you will be viewing 12 different cells. Complete the following in your science notebook:

1. Sketch 1 cell from each of the 12 slides.

2. List any notable structural features of each cell (What does it look like?)

3. Infer about the function of each cell (What does it do?)


Example:1. Sketch 1 cell.

2. Structure - These cells are circular and “donut-shaped”. They do not appear to be connected and they look smooth on the surface. They are also red.

3. Function - These cells could possibly be carriers of hemoglobin within the bloodstream.


Halftime!!!Take a deep breath and stretch!


The END!!!Take a moment to discuss each cell and how their structure is related to their function.


Origin

Where do CELLS come from?


The “Cell Theory” tells us that “cells come from preexisting cells”.


CELLS will usually originate as a zygote or a stem cell (a cell that doesn’t have a job yet).


The zygote/stem cell will become specialized in structure and function through a process called differentiation.


This differentiation is the result of changes in gene expression not changes in the DNA code.


Cell Structure And Function

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