BIOL110 - Lecture 2 – CellsLesson #1 – Cell BasicsIntroductionAfter learning some basic chemistry, we are ready to dive into the smallestliving thing: the cell.In this lesson, we’ll learn about the basic structure andfunction of any type of cell, and we’ll consider how cells keep the outside“out,” and the inside “in” by using a barrier called a cell membrane.Next,we’ll examine the inner cell parts, calledorganelles(“little organs”), andsee how each has a specific function that helps the cell do its work.Finally,we’ll learn how cells make more of themselves in the process of cell division.Inclusion of TheoryAs we have seen, cells are the basic units of life, and they carry out all lifefunctions.The invention of the microscope just prior to the 1600’s led to the firstobservation and discovery of the cell less than 100 years later.Please clickon the link below to watch a 1 minute, 36 second video from EncyclopediaBritannica, Inc. to gain a better understanding of the historical perspective ofcell theory.As you watch, consider the following questions:What type of microscope did Hooke use?In what item were cells observed?Link to video:Learn about Robert Hooke’s Micrographic and HisContribution to the Discovery of CellsBy using a light microscope, Robert Hooke was able to visualize things thatcould not be seen by the naked eye.Cells were named by Robert Hookeafter viewing a section of cork with an early microscope in the 1660s.Hewas looking at dried plant cells and saw that the specimen was divided intosmall sections or “cells” that reminded him of the rooms in a monastery(called cells).
BIOL110 - Lecture 22Robert Hooke, Micrographia, cork.(n.d.). [Image].e_M0010579.jpgBasic Cell ConceptsAs we have seen, cells are the basic units of life, and they carry out all lifefunctions.Cells of the human body come in a variety of shapes and sizesand are specialized for specific functions within the body.Here are a fewexamples of human cells and explanations of how the form of the cellimpacts its function.
BIOL110 - Lecture 23[Image]. (2016).Examples of different types of cells. Retrieved from%C3%A9rents_types_de_cellules_issues_de_la_dif%C3%A9renciation_cellulaire6.jpgMuscle cells are striped due to the arrangement of contractile proteins,whereas nerve cells are long and skinny, so they can transmit informationover long distances. Whatever the cell type, all cells contain the same basicparts and structure, including carrying the genetic information in the form ofDNA in their nucleus.Let’s start to explore the cell by watching the following 6 minute, 52 secondvideo.