Cellular Basis of Life
Cell Biology Links
||"To think about"
Pages 59-75 & 79-82
Pages 83-102 & 106-108
Questions 1-3, 5, & 10
Page 107 , Questions 1,2, & 5
questions 4 & 5
After studying this material you should be able to:
- Explain how a single cell meets the basic criteria that differentiate living organisms from nonliving objects or chemical reactions.
- Draw sketches of common prokaryotic, plant, and animal cells.
- Label the membrane systems, organelles, and other components of each type of cell in your drawings.
- Describe the basic structure of the membranes in the cells you have drawn and describe the roles of these membranes in determining the organization and functions of cells and their organelles.
- Describe the function of each membrane system, organelle, and other cell component in the performance of the life functions of each of the three basic types of cells.
- Describe the role of each cell organelle and membrane system involved in the production and secretion of milk from a mammary gland cell. (Read the text section "Making Milk starting on pg 69 of Lewis' text. Understand the relationships among the organelles illustrated in figures 4.11, pg. 70 and 4.12, pg. 71)
Characteristics of Living Organisms
- Life is organized
- Life requires energy
- Living things must maintain an internal constancy
-homeostasis: the ability to maintain chemical constancy (i.e., to stay the same)
- Living things react to environmental change (i.e., their surroundings)
- Living things reproduce, grow, and develop
- Living things adapt
|Cell Membrane Systems,|
Organelles, and Other Components
|cell wall||plasma membrane|
|phospholipid bilayer||membrane proteins|
|fluid mosaic |
|nucleus||nuclear membrane (envelope)|
|receptor proteins||golgi bodies|
|endoplasmic reticulum (ER)||lysosomes|
Cells as the "Basic Unit of Life"
- pro = before, karyon = kernal (what nuclei looked like to those who first saw them through a microscope)
- cells without organized nuclei bounded by a nuclear membrane
- eubacteria, cyanobacteria, and archaea
- cell wall
- plasma membrane
- no membrane bound organelles