Zadanie 1a
Define osmolarity.
Comparing solution tonicity
Use solute concentration to distinguish hypertonic, hypotonic and isotonic solutions and predict net water movement.
Tę umiejętność sprawdza 7 zadań wzorowanych na arkuszach IB z lat 2022–2024.
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Zadanie 1a
Outline the conditions required for osmosis.
Zadanie 1a
A laboratory compares solutions used to maintain mammalian sperm samples. Define osmolarity.
Zadanie 1b
A model dataset relates the osmolarity of fluid surrounding mammalian sperm to the fraction of moving sperm. (i) State the relationship shown. (ii) Blood plasma has a lower osmolarity than seminal fluid in the model. Explain the expected direction of water…
- Materiał graficzny
Zadanie 3
Equal cylinders cut from a storage root are placed separately in sucrose solutions of 0.00, 0.20, 0.40, 0.60 and 0.80 mol dm⁻³. The solution isotonic with the tissue is 0.35 mol dm⁻³. Assuming the sucrose does not enter the cells during the test, how many…
Zadanie 3
Equal cylinders cut from a storage root are placed separately in sucrose solutions of 0.00, 0.20, 0.40, 0.60 and 0.80 mol dm⁻³. The solution isotonic with the tissue is 0.35 mol dm⁻³. Assuming the sucrose does not enter the cells during the test, how many…
Zadanie 3
A freshwater protist is placed in distilled water. Short arrows show water movement and longer horizontal arrows show the sequence of stages. The protist is moved to a solution that is still hypotonic to its cytoplasm but less dilute than distilled water. What…
- Materiał graficzny