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Lernmaterialien für Physiology an der University of Southampton

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TESTE DEIN WISSEN

excitatory and conductive muscle fibers:

 Specialized fibres (_______ cells) that have few
contractile fibrils
 Pacemaker cells (SinoAtrial, _________ nodes)
spontaneously produce rhythmical APs
 Conductive fibres (Bundle of His) spread excitation
rapidly through the heart, producing co-ordinated,
bio-mechanically efficient beating of the heart.

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TESTE DEIN WISSEN

excitatory and conductive muscle fibers.

 Specialized fibres (syncytial cells) that have few
contractile fibrils
 Pacemaker cells (SinoAtrial AtrioVentricular nodes)
spontaneously produce rhythmical APs
 Conductive fibres (Bundle of His) spread excitation
rapidly through the heart, producing co-ordinated,
bio-mechanically efficient beating of the heart.

Lösung ausblenden
TESTE DEIN WISSEN

where in the eyes smooth muscles are present (and what functions do they have)?

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TESTE DEIN WISSEN

they change size of the iris and alter the shape of the lens

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TESTE DEIN WISSEN

Does smooth muscles have sarcomeres?

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TESTE DEIN WISSEN

No

(sarcomere is this repeating unit between two Z-Lines)

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TESTE DEIN WISSEN
EPSCs and EPSPs  //expand abbreviations

• Miniature responses - vesicular release (only ____ vesicles released)
• EPSCs (_____________) – current
through _____-gated channels / neurotransmitters
• Membrane depolarised (_____ moves _____ the cell)
Lösung anzeigen
TESTE DEIN WISSEN
Excitatory Postsynaptic Currents and Postsynaptic
Potentials (EPSPs)
• Miniature responses - vesicular release (only 1-2 vesicles released)
• EPSCs (excitatory post-synaptic currents) – current
through ligand-gated channels / neurotransmitters
• Membrane depolarised (Na+ moves into the cell)
Lösung ausblenden
TESTE DEIN WISSEN

What does smooth muscles have instead of troponin?

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TESTE DEIN WISSEN

Calmodulin 

1. it binds to Ca+ in cytosol

2. then activates myosin kinase, which phosphorylates mysoin

Lösung ausblenden
TESTE DEIN WISSEN

Chymotrypsin

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TESTE DEIN WISSEN

Chymotrypsin is a digestive enzyme component of pancreatic juice acting in the duodenum, where it performs proteolysis, the breakdown of proteins and polypeptides

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TESTE DEIN WISSEN

Extensor muscle

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TESTE DEIN WISSEN

Extensor muscle, any of the muscles that increase the angle between members of a limb

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TESTE DEIN WISSEN

Smooth Muscle


involuntary meaning it is under a_________ and ________ control

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TESTE DEIN WISSEN

autonomic and hormonal

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TESTE DEIN WISSEN

3 types of muscle

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TESTE DEIN WISSEN

skeletal muscle

smooth muscle

cardiac muscle

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TESTE DEIN WISSEN

Skeletal muscles acts against the skeleton.

Therefore, what does smooth muscles require ?

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TESTE DEIN WISSEN

they require extracellular matrix which they secrete 

(collagen and glycoproteins)

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TESTE DEIN WISSEN

In smooth muscle what are the sources of Ca+

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TESTE DEIN WISSEN

-small amount of Ca+ is stored in SR

-remaining Ca+ comes from ECF (extracellular fluid)

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TESTE DEIN WISSEN

What effect does epinephrine have on the smooth muscles?

Lösung anzeigen
TESTE DEIN WISSEN

It causes relaxation of the smooth muscles in the air-ways and in some blood vessel walls

Lösung ausblenden
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Q:

excitatory and conductive muscle fibers:

 Specialized fibres (_______ cells) that have few
contractile fibrils
 Pacemaker cells (SinoAtrial, _________ nodes)
spontaneously produce rhythmical APs
 Conductive fibres (Bundle of His) spread excitation
rapidly through the heart, producing co-ordinated,
bio-mechanically efficient beating of the heart.

A:

excitatory and conductive muscle fibers.

 Specialized fibres (syncytial cells) that have few
contractile fibrils
 Pacemaker cells (SinoAtrial AtrioVentricular nodes)
spontaneously produce rhythmical APs
 Conductive fibres (Bundle of His) spread excitation
rapidly through the heart, producing co-ordinated,
bio-mechanically efficient beating of the heart.

Q:

where in the eyes smooth muscles are present (and what functions do they have)?

A:

they change size of the iris and alter the shape of the lens

Q:

Does smooth muscles have sarcomeres?

A:

No

(sarcomere is this repeating unit between two Z-Lines)

Q:
EPSCs and EPSPs  //expand abbreviations

• Miniature responses - vesicular release (only ____ vesicles released)
• EPSCs (_____________) – current
through _____-gated channels / neurotransmitters
• Membrane depolarised (_____ moves _____ the cell)
A:
Excitatory Postsynaptic Currents and Postsynaptic
Potentials (EPSPs)
• Miniature responses - vesicular release (only 1-2 vesicles released)
• EPSCs (excitatory post-synaptic currents) – current
through ligand-gated channels / neurotransmitters
• Membrane depolarised (Na+ moves into the cell)
Q:

What does smooth muscles have instead of troponin?

A:

Calmodulin 

1. it binds to Ca+ in cytosol

2. then activates myosin kinase, which phosphorylates mysoin

Mehr Karteikarten anzeigen
Q:

Chymotrypsin

A:

Chymotrypsin is a digestive enzyme component of pancreatic juice acting in the duodenum, where it performs proteolysis, the breakdown of proteins and polypeptides

Q:

Extensor muscle

A:

Extensor muscle, any of the muscles that increase the angle between members of a limb

Q:

Smooth Muscle


involuntary meaning it is under a_________ and ________ control

A:

autonomic and hormonal

Q:

3 types of muscle

A:

skeletal muscle

smooth muscle

cardiac muscle

Q:

Skeletal muscles acts against the skeleton.

Therefore, what does smooth muscles require ?

A:

they require extracellular matrix which they secrete 

(collagen and glycoproteins)

Q:

In smooth muscle what are the sources of Ca+

A:

-small amount of Ca+ is stored in SR

-remaining Ca+ comes from ECF (extracellular fluid)

Q:

What effect does epinephrine have on the smooth muscles?

A:

It causes relaxation of the smooth muscles in the air-ways and in some blood vessel walls

Physiology

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