AT+cancer+homework

3.1 - the cell is the basic unit of life- all living things are made up of cells. nothing smaller than a cell can exist. new cells come from other cells. - cells are tiny because they multiply and divide so frequently. they grow larger as they get nutrients and then they divide (breaking up into smaller cells) - electrion microscopes use electrons to light and create an image of a specimine while a light microscope uses visible light and lenses to magnify a specimine. electron microscopes have higher magnification and resolving power than a light microscope. electron microscopes allow you to see a lot smaller objects than light microscopes. a light microscope uses glass lenses to focus light while the electron microscope uses lectrostatic and electromagnetic lenses.
 * what does the cell theory state?**
 * why are cells so tiny?**
 * how do the light microscope and electron microscopes differ from each other?**

6.3 -Granular Leukocytes (neutrophils, eosinophils, basophils) Agranular Leukocytes (lymphocytes, monocytes) - Granular Leukocytes- - neutrophils- account for 70% of all white blood cells. they are the most abundant white blood cells. they are usually the first responders to bacterial infection and their intense phagocytin activity is essential in overcoming an invasion. -eosinophils- have a bilobed nucleus and their abundant granules take up eosin and become red color. they increase in number in the event of an infection or an allergic reaction. - basophils- have a U-shaped lobed nucleus their granules take up the basic strain and become a dark blue color. they release histamine associated with allergic reactions. - agranular leukocytes - lymphocytes make up 25-30% of all white blood cells and are the second most abundant type of white blood cells. they are responsible for immunity to particular pathogens and their toxins. - monocytes- are the largest white blood cells. the "vacuum cleaner" they suck unwanted substances out. - SCID- cant fight infections because of lack of they enzyme adenosine. - Leukemia- over production of the white blood cells- the white blood cells are abnormal of immature and therefore cannot fight infections. - infectious mononucleosis- when the lymphocytes are mononuclear.
 * what are the different types of white blood cells?**
 * what is the structure and function of each type of white blood cells?**
 * name and describe the three disorders of white blood cells**

18.1

-G1 stage, S stage, G2 stage. -as a cell becomes ready to divide it gets bigger and the organelles double and the ammount of chromiten doubles as DNA synthesis occurs.
 * what are the three stages of interphase?**
 * how does interphase prepare a cell of cell division?**