15680979
Description
Quiz by Rebekah Barger, updated more than 1 year ago
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Created by Rebekah Barger
about 6 years ago
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Question 1
Question
When molecules diffuse across a cell membrane, the direction of movement is into the cell or out of the cell is determined by what?
Answer
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concentration
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proteins
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channels
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carriers
Question 2
Question
What types of molecules are lipids completely impermeable to?
Answer
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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
Question 3
Question
How do molecules in the previous question diffuse across the membrane?
Answer
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active transport
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facilitated diffusion
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osmosis
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simple diffusion
Question 4
Question
What are two ways that active transport is different than facilitated diffusion?
Answer
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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
Question 5
Question
What are the three types of proteins in active transport
Answer
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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
Question 6
Question
The movement of water across a cell membrane is referred to as which of the following?
Answer
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active transport
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osmosis
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simple diffusion
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facilitated diffusion
Question 7
Question
What are capillaries?
Answer
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blood vessels
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arteries
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veins
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barriers
Question 8
Question
Substances exit a capillary by slipping between the cells through pores or [blank_start]intercellular clefts[blank_end].
Answer
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intercellular clefts
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intercellular holes
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extracellular matrix
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