The Cell and Microscope

a microscope is used to examine a specimen that is too small to see with the naked eye.
1. Eyepiece is used to look at the specimen. The objective lenses focus on the slide for examination. The arm is used to carry the microscope. The stage is where the slide is placed for examination. The clips hold the slide in place. The coarse focus gives a rough focus of the slide first. The fine focus wheel gives a more precise focus of the slide. The light source shines light up to the slide. The diaphragm controls the amount of light going to the slide.
  1. animal cell structures under LM: nucleus, cell membrane, cytoplasm.
  2. plant cell structure under LM: cell wall, nucleus cytoplasm.
  3. Electron Microscope: uses electrons instead of light. resolution and magnification are much better
2. Calculate magnification: eyepiece lense X objective lens. Eg. Eyepiece lens 10X Objective lens 4X= 40X
PARTS OF A PLANT CELL(8): cytoplasm, chloroplasts, large vacuole, mitochondria, outer cell wall, inner cell wall, ribosomes, neucleus
PARTS OF AN ANIMAL CELL(6): cell membrane, neucleus, cytoplasm, mitochondria, ribosomes (small vacuole)
1. DIFFERENT: chloroplasts & cell wall
2. cell membrane- made up of phospholipids and proteins- function seperate cell organelles, be semi permeable, support the cell, recognise molecules that touch it
  1. neucleus-contains cells genetic info, controls the activities of the cell.
    1. EUKARYOTES- organisms whose cells contain a neucleus and other membrane bound organelles
    2. PROKARYOTES- organisms whose cells never contain a neucleus or other membrane bound organelles

Nächster

The Cell and Microscope

Beschreibung

Zusammenfassung der Ressource

Medienanhänge

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	Erstellt von Niamh Mannion vor fast 8 Jahre