Thursday, September 29, 2011
Describe how the common cell is the root of multicellular organism diversity.
Cells are primarily made up of four elements: carbon, oxygen, hydrogen, and nitrogen in addition to smaller amounts of other elements. The major building material of the cell is protein. Cells are all different in size and shape. The shape reflects function. All cells exhibit irritability, digest foods, excrete wastes, and are able to reproduce, grow, move, and metabolize. Cells transport substances through the cell membrane either by passive transport or active transport. Osmotic pressure determines if cells gain or lose water. Cell division has two phases, mitosis and cytokinesis. Protein synthesis involves DNA and RNA.
Wednesday, September 21, 2011
Chapter 1 Wordle
Anatomy and Physiology are both significant terms in chapter 1. They are closely related. Anatomy is the study of the structure and shape of the body and body parts and the relationships with one another. Physiology is the study of how the body and its parts work and function. Homeostasis is also another important term because it is a relatively stable internal environment within the body which helps with survival and good health.
Sunday, September 18, 2011
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