Multiple Choice
How do gated channels function in the regulation of sodium and potassium ions across the cell membrane?
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2. Cell Chemistry & Cell Components
Introduction to Membrane Transport
Back2. Cell Chemistry & Cell Components
Introduction to Membrane Transport
- Multiple ChoiceThe filtration membrane includes all of the following except:23views
- Multiple ChoiceSubstances are said to be what when they move from the tubular fluid back into the blood?17views
- Multiple ChoiceWhy are ion channels necessary for the transport of ions into or out of a cell?81views
- Multiple Choice
Which molecule most easily diffuses across a biological membrane's lipid bilayer, without help of a protein?
3868views62rank - Multiple Choice
According to the map above, what kind of large molecule transport is also called the process of cell 'eating'?
4085views46rank - Textbook QuestionFill in the following concept map to review the processes by which molecules move across membranes.1762views
- Textbook QuestionAdd labels to the figure that follows, which illustrates some molecules that can and cannot pass through cell membranes unaided.1041views
- Textbook QuestionWhich of the following processes includes all the others?a. osmosisb. diffusion of a solute across a membranec. passive transportd. transport of an ion down its electrochemical gradient1873views
- Textbook QuestionWhich of the following groups of amino acid residues (see Ch. 3, Figure 3.2) would likely be found in the portion that crosses the lipid bilayer? a. acidicb. basicc. polar unchargedd. nonpolar1355views
- Textbook QuestionHow do the components and structure of cell membranes relate to the functions of membranes?1427views
- Textbook Question
Match the term with its appropriate definition.
Osmosis
Secondary active transport
Exocytosis
Phagocytosis
Simple diffusion
Primary active transport
Pinocytosis
Facilitated diffusion
a. Type of endocytosis in which a large particle is ingested
b. Transport across the plasma membrane against the concentration gradient via direct use of energy from ATP
c. Passive movement of solute across the plasma membrane
d. Movement of solvent from a solution of lower solute concentration to a solution of higher solute concentration
e. Passive movement of solute across the plasma membrane via a channel or carrier protein
f. Type of endocytosis in which ECF is brought into the cell in a protein-coated pit
g. Release of large substances from the cell through a vesicle
h. Transport of a substance across the plasma membrane against its concentration gradient using the energy from the 'downhill' movement of another substance
390views - Textbook Question
Epithelial cells of the kidneys have pumps that drive the transcellular transport of sodium ions.
The movement of sodium ions drives the transcellular transport of water. Explain why water follows sodium. (Connects to Chapter 3)
437views - Textbook Question
Osmosis always involves:
a. A selectively permeable membrane
b. A difference in solute concentration
c. Diffusion
d. Active transport
e. a, b, and c
19views - Textbook Question
A physiologist observes that the concentration of sodium inside a cell is decidedly lower than that outside the cell. She also observes that there is a small leakage of sodium into the cell. What cellular process prevents the sodium concentration gradient from disappearing?
a. Osmosis
b. Diffusion
c. Primary active transport
d. Secondary active transport
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