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BMSC207 - Module 2: Cell Membranes Test with Questions Solved 100% Correct
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BMSC207 - Module 2: Cell Membranes Test with Questions Solved 100% Correct
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BMSC207 - Module 2: Cell MembranesTest with Questions Solved 100% Correct
what is osmosis - Answer diffusion of water
water tends to follow solutes and will do so until what - Answer osmotic equilibrium
is reached
does water move freely between the ICF and ECF - Answer yes
what are aquaporins - Answer channel proteins for water
involved in short term and long-term water regulation of water balance
do aquaporins exist in almost all cells - Answer yes
because there are different solutes in each compartment containing different
charges, the ICF and ECF are said to be in a state of: - Answer chemical and
voltage/electrical equilibrium
the ICF and ECF are said to be in - Answer osmotic equilibrium
,what does osmolarity describe - Answer number of particles in a solution
when a solute is placed in water, they dissociate. When looking at molarity, you think
of it as just one whole molecule. When described osmolarity, you're describing: -
Answer the individual particles, rather than the entire molecule
what are the two ways you can study the bodily compartments - Answer 1. anatomically
- the body cavities
2. functional compartments
- ECF and ICF
what are the 3 main body cavities - Answer cranial, thoracic, abdominopelvic
what separates the ICF from the ECF - Answer plasma membrane
originally, the cell membrane was proposed to consist of ____ - Answer a single layer of
lipids separating aqueous fluids of interior and outside environment
what are the four main functions of the cell membrane - Answer 1. physical isolation
- barrier separating ICF and ECF
2. regulation of exchange with the environment
- controls entry, elimination, and release (semi-permeable)
3. communication between the cell and its environment
- contains proteins that allow for responding or interaction with external
environment 4. structural support
the cell membrane is mainly composed of - Answer lipid, protein, and a small amount
of carbohydrate
, in general, the more metabolically active the membrane is, the more_____it contains -
Answer proteins
-needs enzymes to undergo chemical reactions; enzymes are considered proteins
are all membranes created the same - Answer no; ratios between proteins, lipids
and carbohydrates depends on that particular's membrane's function.
what are the three lipids found in the cell membrane - Answer 1. phospholipids
2. sphingolipids
3. cholesterol
what is the main type of lipid found in the membrane - Answer phospholipids
phospholipids have a ____head - Answer polar/charged
what types of membranes can phospholipids form - Answer bilayers, micelles,
and liposomes
how do phospholipids arrange themselves - Answer The water-loving phosphate
heads face outward and all of the water-fearing fatty acid tails face inward
amphipathic molecules are what - Answer having both hydrophilic and hydrophobic
properties
all three types of lipids are said to be what - Answer amphipathic
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