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PHY2011 - Neuroscience of communication, sensory and control systems - S1 2025
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The term tonicity describes
Mammalian Red Blood Cells generally do not burst in a solution of 80% physiological saline because
To measure effective osmolarity of a solute in solution you need to
Lysis of RBCs occurs faster in Urea than in Glycerol because
Given the following three compounds and values for partition coefficient and size:
| Molecule | Propylene Glycol (PG) | Thioacetamide (TA) | ThioUrea (TU) |
| Log P oct:water | -0.9 | -0.3 | -1.08 |
| MW | 76 | 75 | 76 |
you would expect that permeation of these compounds into a mammalian RBC would, in order of speed from fastest to slowest, be
In the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the
Lysis of RBCs occurs rapidly in 40% physiological saline because
What is the Osmolarity of a solution of 0.14 M sucrose (cane sugar) + 0.154 M NaCl, compared to 100% Physiological Saline?
(Assume Osmolarity of 100% physiological Saline to be 300 mOsm, the Molecular Weight of Sucrose=340 and NaCl is completely dissociated)
The term osmolarity describes
With respect to mammalian RBCs, 0.9% NaCl is described as being