L6 Cell Anatomy: Membrane bound organelles

Pregunta 1 de 8

1

Which is NOT a function of membranes?

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

Explicación

Pregunta 2 de 8

1

Which statements about the plasma membrane are CORRECT?

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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.

Explicación

Pregunta 3 de 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,

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 4 de 8

1

Proteins are unspecific to cell type.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 5 de 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.

Arrastra y suelta para completar el texto.

high to low

down

low to high

up

Explicación

Pregunta 6 de 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

Explicación

Pregunta 7 de 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

Explicación

Pregunta 8 de 8

1

Which of the following is not a function of proteins?

Selecciona una o más de las siguientes respuestas posibles:

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

	Creado por Mer Scott hace más de 7 años

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

Pregunta 1 de 8

Which is NOT a function of membranes?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 8

Which statements about the plasma membrane are CORRECT?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 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,

Selecciona uno de los siguientes:

Explicación

Pregunta 4 de 8

Proteins are unspecific to cell type.

Selecciona uno de los siguientes:

Explicación

Pregunta 5 de 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.

Arrastra y suelta para completar el texto.

Explicación

Pregunta 6 de 8

Arrastra y suelta para completar el texto.

Explicación

Pregunta 7 de 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.

Arrastra y suelta para completar el texto.

Explicación

Pregunta 8 de 8

Which of the following is not a function of proteins?

Selecciona una o más de las siguientes respuestas posibles:

Explicación