Stem Cells And Tisue Engineering an der Universität Für Bodenkultur Wien | Karteikarten & Zusammenfassungen

Lernmaterialien für Stem cells and tisue engineering an der Universität für Bodenkultur Wien

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Gap junction vs tight junction?

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  • Gap junction: exchange of substances between cells
  • Thight junction: barrier function between e.g. polarized cells like skin, vascular system, etc. to prevent leakage or passage between cells.
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What cell interaction proteins attach a cell to the basal lamina?

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  • Hemidesmosomes
  • Focal adhesions
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What interaction proteins hold cells together?

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  • Desmosomes
  • Adherens junctions
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Name the 3 major groups of plasma membrane receptors!

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  • Ion channels
  • G protein coupled receptors
  • Enzyme linked receptors
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What is a tissue?

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A group of cells that are similar in structure and function

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What are the 4 primary tissues?

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  • Muscle tissue
  • Nerve tissue
  • Epithelial tissue
  • Connective tissue
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What are the 3 types of muscle tissue?

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  • Sceletal muscle
  • Cardiac muscle
  • Smooth muscle
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How does the contraction controll in muscle cells work?

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An electrical action potential is required from a nerve cell that excites an action potential in the muscle cell in form of Na, K and Ca2+ ion polatization. The actual contraction is coordinated by Ca2+ changes in the actomyosin system. Whatever that means.

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How do cardiomyocytes and muscle cells differ structurally?

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Skeletal muscles form a real syncytium, a polynucleated cell. Cardiomyocytes on the other hand are joint by gap juncitons to enable good communication.

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TESTE DEIN WISSEN

How is the contration of 

  • skeletal muscle
  • cardiac muscle
  • smooth muscle

coordinated?

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TESTE DEIN WISSEN
  • Skeletal muscle
    • coordinated by grouping them in moror units
  • Cardiac muscle
    • coordinated by the interconnection of the cells via gap junctions
  • Smooth muscle
    • Unitary smooth muscle cells
      • synchronized via gap junctions
      • Coordinated via motor unit groupings
Lösung ausblenden
TESTE DEIN WISSEN

Apart from the neuron, there are other cells that make up the CNS. Which ones and what is their task?

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TESTE DEIN WISSEN

Glial cells, there are 10 times as many glial cels than neurons! There are Macroglia, which are responsible for e.g. the myelination of the neurons ->  oligodendrocytes ans Schwann cells, or nurish the neurons -> astrocytes 


But there are also microglial cells that are responsible for the scavenging (removal of trash and debris from the CNS).

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TESTE DEIN WISSEN

Shortly describe the function of the 3 constituents of the cytoskeleton!

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TESTE DEIN WISSEN
  • Actin filaments: 
    • Contraction
    • Migration
    • Signaling
  • Intermediate filaments
    • Structural
  • Big network that allows the movement of vesicles and cellular components around the cell.


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Q:

Gap junction vs tight junction?

A:
  • Gap junction: exchange of substances between cells
  • Thight junction: barrier function between e.g. polarized cells like skin, vascular system, etc. to prevent leakage or passage between cells.
Q:

What cell interaction proteins attach a cell to the basal lamina?

A:
  • Hemidesmosomes
  • Focal adhesions
Q:

What interaction proteins hold cells together?

A:
  • Desmosomes
  • Adherens junctions
Q:

Name the 3 major groups of plasma membrane receptors!

A:
  • Ion channels
  • G protein coupled receptors
  • Enzyme linked receptors
Q:

What is a tissue?

A:

A group of cells that are similar in structure and function

Mehr Karteikarten anzeigen
Q:

What are the 4 primary tissues?

A:
  • Muscle tissue
  • Nerve tissue
  • Epithelial tissue
  • Connective tissue
Q:

What are the 3 types of muscle tissue?

A:
  • Sceletal muscle
  • Cardiac muscle
  • Smooth muscle
Q:

How does the contraction controll in muscle cells work?

A:

An electrical action potential is required from a nerve cell that excites an action potential in the muscle cell in form of Na, K and Ca2+ ion polatization. The actual contraction is coordinated by Ca2+ changes in the actomyosin system. Whatever that means.

Q:

How do cardiomyocytes and muscle cells differ structurally?

A:

Skeletal muscles form a real syncytium, a polynucleated cell. Cardiomyocytes on the other hand are joint by gap juncitons to enable good communication.

Q:

How is the contration of 

  • skeletal muscle
  • cardiac muscle
  • smooth muscle

coordinated?

A:
  • Skeletal muscle
    • coordinated by grouping them in moror units
  • Cardiac muscle
    • coordinated by the interconnection of the cells via gap junctions
  • Smooth muscle
    • Unitary smooth muscle cells
      • synchronized via gap junctions
      • Coordinated via motor unit groupings
Q:

Apart from the neuron, there are other cells that make up the CNS. Which ones and what is their task?

A:

Glial cells, there are 10 times as many glial cels than neurons! There are Macroglia, which are responsible for e.g. the myelination of the neurons ->  oligodendrocytes ans Schwann cells, or nurish the neurons -> astrocytes 


But there are also microglial cells that are responsible for the scavenging (removal of trash and debris from the CNS).

Q:

Shortly describe the function of the 3 constituents of the cytoskeleton!

A:
  • Actin filaments: 
    • Contraction
    • Migration
    • Signaling
  • Intermediate filaments
    • Structural
  • Big network that allows the movement of vesicles and cellular components around the cell.


Stem cells and tisue engineering

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