UWL ESS 205 - Cell Structure (3 pages)

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Cell Structure

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Cell Structure


In depth descriptions of cells and their shapes and functions.

Lecture number:
Lecture Note
University of Wisconsin-La Crosse
Ess 205 - Human Anatomy and Physiology for Exercise Science I

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ESS 205 Anatomy and Physiology Lecture 2 Outline of Last Lecture I Why is Anatomy and Physiology important II Anatomy being the study of form III Physiology being the study of function IV Human Structure a Anatomical Variation b Human Function c Physiological Variation d Homeostasis e Negative and Positive Feedback Loops V Analyzing Anatomical Terms a Terminology Outline of Current Lecture II Development of Cell Theory III Concepts of Cellular Structure IV Cell Surface V Membrane Transport VI Cytoplasm Current Lecture 1 Hooke was the first to name the cell the cell He was observing a cork Schwann then stated that all living animals come from cells Pasteur s research observed that organism cannot spontaneously generate meaning that non living organisms cannot turn into living organisms These 4 men ultimately led others to develop the Modern Cell Theory a The principles of this theory is that all organisms are composed of cells and cell products a cell is the SIMPLEST structure for a unit of life that an organisms functions are due to the activities in a cell cells come from PREexisting cells and there are fundamental similarities in cells of all species 2 There are different shapes of cells These shapes determine function and location There are more than 200 different shapes but the key shapes to memorize are Cuboidal which are squarish Squamous which are thin flat and angular Discoid These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute which have a disc shape blood cells Spheroid round to oval Polygonal irregular shapes and more than four sides Fusiform thick middles and tapered ends Columnar which are taller than wide like a column Fibrous long and slender and finally Stellate which are star shaped 3 Next is Cell Surface which is the Plasma Membrane We are now talking about what a cell consists of The Plasma Membrane is a phospholipid bilayer which means it has two

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