Chapter 6 a tour of the cell
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Chapter 6 A Tour of the Cell. “Faith is a fine invention when gentlemen can see, but microscopes are prudent in an emergency.” Emily Dickinson. Question ?. Can cells be seen with the naked eye?. Light Microscope - LM. Light Microscope. Occular Lens. Objective Lens.

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Chapter 6 A Tour of the Cell

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Chapter 6 a tour of the cell

Chapter 6 A Tour of the Cell


Chapter 6 a tour of the cell

Faith is a fine invention when gentlemen can see, but microscopes are prudent in an emergency.Emily Dickinson


Question

Question ?

  • Can cells be seen with the naked eye?


Light microscope lm

Light Microscope - LM


Light microscope

Light Microscope

Occular Lens

Objective Lens

Stage with specimen

Light Source


Magnification

Magnification


Resolution

Resolution


Limitations lm

Limitations - LM


Electron microscopes

Electron Microscopes


Chapter 6 a tour of the cell

TEM

SEM


Advantages

Advantages


Disadvantages

Disadvantages


Transmission electron microscope tem

Transmission Electron Microscope - TEM


Tem limitations

TEM Limitations


Scanning electron microscope sem

Scanning Electron Microscope - SEM

  • Excellent views of surfaces.

  • Produces 3-D views.

  • Live specimens possible.


Limitations

Limitations

  • Lower magnifications than the TEM.


Cell biology or cytology

Cell Biology or Cytology

  • Cyto = cell - ology = study of

  • Should use observations from several types of microscopes to make a total picture of how a cell is put together.


Other tools for cytology

Other Tools for Cytology


Cell fractionation

Cell Fractionation


Cell fractionation1

Cell Fractionation


Chromatography

Chromatography


Electrophoresis

Electrophoresis


History of cells

History of Cells


History of cells1

History of Cells

  • 1833 - Robert Brown, discovered the nucleus.

  • 1838 - M.J. Schleiden, all plants are made of cells.

  • 1839 - T. Schwann, all animals are made of cells.

  • 1840 - J.E. Purkinje, coined the term protoplasm.


Cell theory

Cell Theory


R virchow

R. Virchow


Types of cells

Types of Cells

  • Prokaryotic

  • Eukaryotic -.


Both have

Both Have:


Chapter 6 a tour of the cell

Prokaryotic

Eukaryotic

Nucleus


Chapter 6 a tour of the cell

Eukaryotic

Prokaryotic


Why are cells so small

Why Are Cells So Small?


Basic cell organization

Basic Cell Organization


Chapter 6 a tour of the cell

AnimalCell


Chapter 6 a tour of the cell

Plant Cell


Membrane

Membrane


Cytoplasm or cytosol

Cytoplasm or Cytosol


Organelle

Organelle


Organelles function

Organelles - function


You must be able to

You must be able to:


Nucleus

Nucleus


Structure

Structure


Nuclear membrane

Nuclear Membrane


Nuclear pores

Nuclear Pores


Nucleolus

Nucleolus


Chromatin

Chromatin

  • Chrom: colored

  • - tin: threads


Nucleus function

Nucleus - Function


Ribosomes

Ribosomes


Subunits

Subunits


Locations

Locations

  • Free in the cytoplasm -.

  • Membrane bound -


Endomembrane system

Endomembrane System


Endomembrane system1

Endomembrane System


Endoplasmic reticulum

Endoplasmic Reticulum


Structure of er

Structure of ER


Types of er

Types of ER

  • Smooth ER:

  • Rough ER:


Golgi apparatus

Golgi Apparatus


Structure has 2 faces

Structure Has 2 Faces

  • Cis face

  • Transface -


Function of golgi bodies

Function of Golgi Bodies


Golgi vesicles

Golgi Vesicles


Lysosome

Lysosome


Function

Function


Lysosomes

Lysosomes


Vacuoles

Vacuoles


Protists

Protists


Plants

Plants


Function1

Function


Function plant vacuole

Function: Plant vacuole


Microbodies

Microbodies

  • Peroxisomes:

  • Glyoxysomes:


Chapter 6 a tour of the cell

Enzymes in a crystal


Mitochondria

Mitochondria

  • .


Inner membrane

Inner Membrane


Function2

Function


Mitochondria1

Mitochondria


Chloroplasts

Chloroplasts


Inner or thylakoid membranes

Inner or Thylakoid Membranes


Function3

Function


Chloroplasts1

Chloroplasts


Plastids

Plastids


Examples

Examples

  • Amyloplasts/ Leucoplasts

  • Chromoplasts -


Ergastic materials

Ergastic Materials


Cytoskeleton

Cytoskeleton


Functions

Functions


Components

Components


Chapter 6 a tour of the cell

Intermed.

  • MicrotubulesMicrofilamentFilaments

  • Hollow Solid Cables

  • Tubulin Actin (Keratin)

  • Dynein

  • Cilia/Flagella Muscle Anchors

    Contraction Organelles

    Cell Division


Microtubules

Microtubules


Tubulin

Tubulin

  • .


Microtubules1

Microtubules


Microtubules2

Microtubules


Cilia and flagella

Cilia and Flagella


Cilia and flagella1

Cilia and Flagella


Dynein protein

Dynein Protein


Centrioles

Centrioles


Basal bodies

Basal Bodies


Chapter 6 a tour of the cell

Basal Body


Mtocs

MTOCs


Microfilaments

Microfilaments


Chapter 6 a tour of the cell

Microfilaments are stained green.


Functions1

Functions


Intermediate filaments

Intermediate Filaments


Functions2

Functions


Cytoskeleton1

Cytoskeleton


Cell wall

Cell Wall


Plant cell walls

Plant Cell Walls


Primary wall

Primary Wall


Secondary wall

Secondary Wall


Middle lamella

Middle Lamella


Cell walls

Cell Walls

  • .


Extracellular matrix ecm

Extracellular Matrix - ECM


Intercellular juctions

Intercellular Juctions


Plasmodesmata

Plasmodesmata


Intercellular juctions1

Intercellular Juctions


Tight junctions

Tight Junctions


Desmosomes

Desmosomes


Gap junctions

Gap Junctions


Summary

Summary

  • Answer: Why is Life cellular and what are the factors that affect cell size?

  • Be able to identify cellular parts, their structure, and their functions.


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