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Neurobiology Quiz 3
Terms in this set (33)
A membrane is composed of two opposing sides:
Glucose, ions, proteins, and organic molecules are lipophobic or lipophilic?
Transport proteins allow for __________ permeability
Oxygen and alcohol are lipophobic or lipophilic? This means that they can or cannot cross the cell wall via simple diffusion?
__________ causes the formation of bends/kinks in the cell membrane, as well as mediates membrane fluidity.
__________ proteins cross the whole membrane, while __________ proteins "sit" on one side and do NOT cross the membrane.
The sugar part of the protein (i.e. GLYCOprotein), is always found inside or outside the cell membrane?
Extracellular fluid is known as __________ fluid, while intracellular fluid is known as __________.
Interstitial fluid, cytosol
Blood plasma has almost the same concentration as what other type of fluid?
The major extracellular cation is __________, while the major intracellular cation is __________.
The extracellular sodium concentration is __________ __________(units).
The intracellular sodium concentration is __________ __________ (units).
140 mM, 10-20 mM
The extracellular potassium concentration is __________ __________ (units).
The intracellular potassium concentration is __________ __________ (units).
4.5 mM, 90-120 mM
The main extracellular anion is __________. The main intracellular anions are __________ and __________.
Chlorine, proteins, phosphates
Diffusion of lipophilic substances follows a __________ trend(think of the graph). Therefore, a __________ concentration equates to __________ transport.
Linear, higher, faster
Mediated transport is limited by the speed of the __________ themselves. To a certain point, a larger amount of substance equates to __________ transport, however the __________ themselves reach their limit when there is too much substance and "top out".
Transporters, faster, transporters
The ONLY substance able to move solely via osmosis is __________. Special channels responsible for this movement are called __________.
The movement of substances based on pressure is called __________ (think of a vacuum).
The movement of a substance down its concentration gradient using channels is called __________.
During __________, the cell uses __________ to move things "uphill", or against the concentration gradient.
active transport, ATP
Endocytosis and exocytosis are done using __________.
Neurotransmitters are moved via __________.
Diffusion is defined as the movement of a substance down its __________. It is based on the mathematical principle of __________.
concentration gradient, probability
Diffusion continues until __________ has been reached.
The __________ force is what causes the movement. An example of this is the __________ of a substance.
Movement down a concentration gradient is also known as __________.
Net flux (lol not Netflix)
At the __________ __________, there is no net change, however the driving forces may still be occurring. For example, oxygen is always going into a cell, but not always coming out. This is because the cell utilizes oxygen and "spends" it, therefore not returning much of it.
__________ is a special case of steady state.
Equilibrium is a special case of __________.
An example of net __________ is dissolving food coloring in water.
The diffusion of a substance is highly dependent on the __________ of the substance.
Diffusion is affected by a myriad of other factors. Name a few of them (type your answer in parentheses to avoid an incorrect answer).
(Molecular size/weight, temperature, size of the gradient, electrical charge present, solubility, viscosity, distance)
LEARN FLICKS LAW OF SIMPLE DIFFUSION
LEARN FLICKS LAW OF SIMPLE DIFFUSION
There are 3 main types of carrier-mediated transport. Name them.
Uniport, symport (cotransport), antiport (counter transport)
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