{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Notes 05 The Cell - The Cell Cell Theory cells are the...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
The Cell Cell Theory cells are the basic unit of all living things and all cells come from other cells Robert Hooke (1665) looked at cork under the microscope and named the structures “cells” meaning “little room” Schleiden and Schwann (1838-39) determined that all living things are composed of cells (1st part of the cell theory) Rudolph Virchow (1858) determined all living cells arise from preexisting cells (NO spontaneous generation of cells from nonliving matter) (2nd part of the cell theory)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
All cells must maintain homeostasis (process of maintaining an internal environment that is appropriate and supportive to life) All cells have a plasma membrane acts as a selective barrier All cells have cytoplasm semifluid medium in cell most cells have organelles structures specialized for various functions
Background image of page 2
Cell size is limited small because of the relationship between surface area and volume everything must enter and leave through the membrane surface area of membrane must be large enough relative to cell volume to keep up with passage of materials in and out
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
cells are usually measured in micrometers ( m) 1/1,000,000 (one-millionth) of a meter cell components are measured in nanometers (nm) 1/1,000,000,000 (one-billionth) of a meter
Background image of page 4
Cells are studied by microscopes
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.