Physiology at University Of Brighton | Flashcards & Summaries

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Lernmaterialien für Physiology an der University of Brighton

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Which neurotransmitter do you find in skeletal muscle?

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Acetylcholine

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Name the primary ion responsible for depolarisation in an action potential.

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Na+ moving inwards

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In electricity, what is g?


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Conductance - reciprocal of resistance (1/R)

It is the ease with which charge can be conducted along a particular path

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What is a “failed initiation” of an action potential?

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A small, local depolarisation that fails to reach the threshold potential and therefore fails to trigger an action potential in the post-synaptic cell

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What is the function of the sarcomere?

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Contraction by pulling fixed structures (Z lines) toward each other.

If many sarcomeres shorten it causes whole muscle contraction.

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What does an active ACh receptor do?

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Small depolarisation in myocyte membrane that may initiate myocyte action potential

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Name 5 symptoms (or signs) that a physician might detect due to ionic concentrations being unbalanced.


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Cardiac arrhythmias.
Tics and nervous dysfunctions
Seizures
Bone deformities
Oedema

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What is the main functional difference between an excitable cell and a non-excitable cell?


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Excitable cells can produce OR respond to electrical signals
Excitable cells can propagate action potentials

Non-excitable cells do not respond to an action potential

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What is the equilibrium potential of Ca2+?


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+123 mV

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Compare the fluid content (particularly the ions) inside the cells to the fluid surrounding the cells.


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Inside: main cation is K+; the main anion is protein and Cl-
Extracellular: main cation is Na+; the main anion is Cl-

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TESTE DEIN WISSEN

What are the main causes of ionic imbalances in patients?


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Trauma, haemorrhage, diarrhoea, vomiting, hormonal imbalances, diabetes, diuretics, kidney dysfunction, dehydration, poisons


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TESTE DEIN WISSEN

Superficially describe the fluid content (particularly the ions) surrounding the cells.


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TESTE DEIN WISSEN

Extracellular fluid: water, with electrolytes in it (Na+ and Cl-) It is pH = 7.4
ECF has much less protein than intracellular space or than the plasma, so it has more Cl- and less protein than those other fluid compartments

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  • 13932 Karteikarten
  • 192 Studierende
  • 2 Lernmaterialien

Beispielhafte Karteikarten für deinen Physiology Kurs an der University of Brighton - von Kommilitonen auf StudySmarter erstellt!

Q:

Which neurotransmitter do you find in skeletal muscle?

A:

Acetylcholine

Q:

Name the primary ion responsible for depolarisation in an action potential.

A:

Na+ moving inwards

Q:

In electricity, what is g?


A:

Conductance - reciprocal of resistance (1/R)

It is the ease with which charge can be conducted along a particular path

Q:

What is a “failed initiation” of an action potential?

A:

A small, local depolarisation that fails to reach the threshold potential and therefore fails to trigger an action potential in the post-synaptic cell

Q:

What is the function of the sarcomere?

A:

Contraction by pulling fixed structures (Z lines) toward each other.

If many sarcomeres shorten it causes whole muscle contraction.

Mehr Karteikarten anzeigen
Q:

What does an active ACh receptor do?

A:

Small depolarisation in myocyte membrane that may initiate myocyte action potential

Q:

Name 5 symptoms (or signs) that a physician might detect due to ionic concentrations being unbalanced.


A:

Cardiac arrhythmias.
Tics and nervous dysfunctions
Seizures
Bone deformities
Oedema

Q:

What is the main functional difference between an excitable cell and a non-excitable cell?


A:

Excitable cells can produce OR respond to electrical signals
Excitable cells can propagate action potentials

Non-excitable cells do not respond to an action potential

Q:

What is the equilibrium potential of Ca2+?


A:

+123 mV

Q:

Compare the fluid content (particularly the ions) inside the cells to the fluid surrounding the cells.


A:

Inside: main cation is K+; the main anion is protein and Cl-
Extracellular: main cation is Na+; the main anion is Cl-

Q:

What are the main causes of ionic imbalances in patients?


A:

Trauma, haemorrhage, diarrhoea, vomiting, hormonal imbalances, diabetes, diuretics, kidney dysfunction, dehydration, poisons


Q:

Superficially describe the fluid content (particularly the ions) surrounding the cells.


A:

Extracellular fluid: water, with electrolytes in it (Na+ and Cl-) It is pH = 7.4
ECF has much less protein than intracellular space or than the plasma, so it has more Cl- and less protein than those other fluid compartments

Physiology

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