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PowerPoint on Cells and Cellular Structures R70,00
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  3. 10th Grade
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PowerPoint on Cells and Cellular Structures
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This PowerPoint contains 45 slides and is not only packed with valuable information concerning cells and cellular structures but it also touches on the different types of Microscopes with an explanation attached to each. It covers the whole cell, from the cell walls to ribosomes and the golgi body

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Document information

  • November 15, 2022
  • 45
  • 2022/2023
  • Presentation
  • Unknown

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Prigge

Available practice questions

Cells and Cellular structure Flashcards

Flashcards 13 Flashcards
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Flashcards 13 Flashcards
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Some examples from this set of practice questions

1.

List the 3 different types of Microscopes.

Answer: LM( Light Microscope) TEM( Transmission Electron Microscope) SEM ( Scanning electron Microscope)

2.

What is the smallest unit of protoplasm

Answer: cell

3.

List 2 Functions of the cell wall

Answer: 1.)Cellulose provides strength and rigidity 2.) It protects the cell membrane and the cell contents from injury

4.

Describe the structure of a nucleus.

Answer: A nucleus appears as a spherical, ovoid or slightly elongated structure, usually near the centre of the cell

5.

What is The ER, and what does it stand for?

Answer: 1.)It stands for Endoplasmic Reticulum 2.)The Endoplasmic Reticulum is a network of flattened, interconnecting tubules extending throughout the cytoplasm which is a continuation of the nuclear membrane.  These tubules, or hollow sheets, are formed by cell membranes, and they allow for intracellular transport (i.e. within one cell)

6.

What is the ER responsible for?

Answer: The ER is responsible for the production of hormones and secretory products

7.

List the 2 types of ER

Answer: 1.) Smooth ER 2.)Rough ER

Content preview

CELLS & CELLULAR
STRUCTURES

,Background
The cell is the basic structural & functional
unit of all living organisms
All living organisms consist of at least one
cell
Term “cell” coined by Robert Hooke in 1665
All cells develop from already existing cells
Almost all cells consist of a nucleus in
cytoplasm
All cells undergo metabolism
Similar molecules are found in all cells

,Microscopes
LM (light microscope) – used in class; light shines through object; lenses
enlarge & focus object up to 1000 × (HMB max 400 ×)
TEM (transmission electron microscope) – electrons move through
material (a beam of electrons is transmitted through an ultra thin
specimen, interacting with the specimen as it passes through. An image
is formed from the interaction of the electrons transmitted through the
specimen; the image is magnified and focused onto an imaging device,
such as a fluorescent screen, on a layer of photographic film, or to be
detected by a sensor such as a CCD camera.)
SEM (scanning electron microscope) – used to study the surface
structure of objects (electron microscope that images a sample by
scanning it with a high-energy beam of electrons in a raster scan
pattern. The electrons interact with the atoms that make up the sample
producing signals that contain information about the sample's surface
topography, composition, and other properties such as
electrical conductivity.)

,TEM ultrastructure of a liver cell

, SEM of an ant head

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