Multiple Choice
In the context of osmosis, if the blood has a higher solute concentration than the matrix of the brain, how would you describe the tonicity of the blood relative to the brain matrix?
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6. The Membrane
Osmosis
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The body fluids of an osmoconformer would be ________ with its ________ environment.
A
hypertonic; internal
B
hypotonic; external
C
isotonic; internal
D
isotonic; external
Verified step by step guidance1
Understand the concept of osmoconformers: Osmoconformers are organisms that maintain their internal body fluid osmolarity equal to the osmolarity of their external environment. This means their body fluids are isotonic with the surrounding environment.
Define isotonic: Isotonic refers to a state where the concentration of solutes in two solutions is equal, resulting in no net movement of water across a semipermeable membrane.
Analyze the options provided: Hypertonic means the internal environment has a higher solute concentration than the external environment, which is incorrect for osmoconformers. Hypotonic means the internal environment has a lower solute concentration than the external environment, which is also incorrect. Isotonic with the external environment is the correct description for osmoconformers.
Relate the correct answer to the external environment: Osmoconformers adjust their internal osmolarity to match the external environment, ensuring their body fluids remain isotonic with the external surroundings.
Conclude that the correct answer is 'isotonic; external,' as this aligns with the biological definition and function of osmoconformers.
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