15680979
Descripción
Test por Rebekah Barger, actualizado hace más de 1 año
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Creado por Rebekah Barger
hace más de 5 años
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Pregunta 1
Pregunta
When molecules diffuse across a cell membrane, the direction of movement is into the cell or out of the cell is determined by what?
Respuesta
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concentration
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proteins
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channels
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carriers
Pregunta 2
Pregunta
What types of molecules are lipids completely impermeable to?
Respuesta
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large polar molecules
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ions
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large nonpolar molecules
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small polar molecules
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all polar molecules
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all nonpolar molecules
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small nonpolar molecules
Pregunta 3
Pregunta
How do molecules in the previous question diffuse across the membrane?
Respuesta
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active transport
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facilitated diffusion
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osmosis
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simple diffusion
Pregunta 4
Pregunta
What are two ways that active transport is different than facilitated diffusion?
Respuesta
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Active transport requires energy
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Facilitated diffusion requires energy
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Active transport moves against the concentration gradient. It moves from low concentration to high concentration
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Active transport moves against the concentration gradient. It moves from high concentration to low concentration
Pregunta 5
Pregunta
What are the three types of proteins in active transport
Respuesta
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channel proteins
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uniporters
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symporters
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antiporters
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transporters
Pregunta 6
Pregunta
The movement of water across a cell membrane is referred to as which of the following?
Respuesta
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active transport
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osmosis
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simple diffusion
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facilitated diffusion
Pregunta 7
Pregunta
What are capillaries?
Respuesta
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blood vessels
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arteries
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veins
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barriers
Pregunta 8
Pregunta
Substances exit a capillary by slipping between the cells through pores or [blank_start]intercellular clefts[blank_end].
Respuesta
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intercellular clefts
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intercellular holes
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extracellular matrix
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