L6 Cell Anatomy: Membrane bound organelles

Frage 1 von 8

1

Which is NOT a function of membranes?

Wähle eine der folgenden:

Separation of incompatible processes
Creation of concentration gradients
Packaging for transport
Digestion of debris

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Frage 2 von 8

1

Which statements about the plasma membrane are CORRECT?

Wähle eine oder mehr der folgenden:

It is a fluid phospholipid bilayer with proteins and other lipids incorporated into it.
It is permeable to hydrophobic molecules like steroid hormones.
It restricts entry of hydrophilic and ionic (charged) molecules/
It is always saturated.

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Frage 3 von 8

1

Cholesterol acts as a fluidity buffer for the plasma membrane as it makes the phospholipid layer more viscous, but also lowers its solidifying point,

Wähle eins der folgenden:

WAHR
FALSCH

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Frage 4 von 8

1

Proteins are unspecific to cell type.

Wähle eins der folgenden:

WAHR
FALSCH

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Frage 5 von 8

1

There are two types of transport in regards to energy transfer: passive and active. Passive is from ❌ concentration, "❌" a gradient. Active is from ❌ concentration, "❌" a gradient.

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high to low

down

low to high

up

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Frage 6 von 8

1

Facilitated diffusion is a form of ❌ transport where molecules are too large to diffuse through a membrane on their own. Facilitated diffusion involves ❌.
Channels can be "leak" channels where molecules can ❌ move, or they can be gated. Voltage-gated channels respond to changes in ❌ whereas ligand-gated channels respond to ❌.

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passive

channels or carrier proteins

freely

charge

chemical signals

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Frage 7 von 8

1

Active transport utilises ❌ that act as pumps which use ❌ to move molecules ❌ a concentration gradient. This is important for maintaining ❌ of ions, and can be direct or indirect. A classic example is the ❌ pump.

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ATP

up

concentration

sodium-potassium

proteins

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Frage 8 von 8

1

Which of the following is not a function of proteins?

Wähle eine oder mehr der folgenden:

Signal transduction
Cell recognition
Linking of membranes to the cytoskeleton or ECM
Linking of cells
Linking of organelles

	Erstellt von Mer Scott vor mehr als 7 Jahre

Objectives: Outline the importance of organelles and sub-cellular compartments • Describe the structure of the plasma membrane and outline its importance to cell function • Outline mechanisms by which substances traverse the plasma membrane

L6 Cell Anatomy: Membrane bound organelles

Frage 1 von 8

Which is NOT a function of membranes?

Wähle eine der folgenden:

Erklärung

Frage 2 von 8

Which statements about the plasma membrane are CORRECT?

Wähle eine oder mehr der folgenden:

Erklärung

Frage 3 von 8

Cholesterol acts as a fluidity buffer for the plasma membrane as it makes the phospholipid layer more viscous, but also lowers its solidifying point,

Wähle eins der folgenden:

Erklärung

Frage 4 von 8

Proteins are unspecific to cell type.

Wähle eins der folgenden:

Erklärung

Frage 5 von 8

There are two types of transport in regards to energy transfer: passive and active. Passive is from ❌ concentration, "❌" a gradient. Active is from ❌ concentration, "❌" a gradient.

Klicke und ziehe, um den Text zu vervollständigen.

Erklärung

Frage 6 von 8

Klicke und ziehe, um den Text zu vervollständigen.

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Frage 7 von 8

Active transport utilises ❌ that act as pumps which use ❌ to move molecules ❌ a concentration gradient. This is important for maintaining ❌ of ions, and can be direct or indirect. A classic example is the ❌ pump.

Klicke und ziehe, um den Text zu vervollständigen.

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Frage 8 von 8

Which of the following is not a function of proteins?

Wähle eine oder mehr der folgenden:

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