Zadanie 5b
Outline how a rise in transpiration rate affects leaf-cell water potential.
Water potential
Umiejętności w tym dziale
Umiejętności z tego działu sprawdza 30 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 22 z 54 arkuszy w bazie.
Zadania z tego działu: 30 Otwórz w wyszukiwarce z filtrami
Zadanie 5c
Explain the effect on a leaf cell’s water potential when its solute potential becomes less negative, with pressure potential unchanged.
Zadanie 10
Membranes support water balance, electrical signalling and energy conversion. (a) Outline what happens to cells in a piece of plant tissue transferred to a hypotonic solution. (b) Describe the establishment and maintenance of a resting membrane potential in a…
Zadanie 19
Flaccid celery cells are transferred to a dilute solution whose solute concentration is lower than that of the cell contents. Their walls remain intact. Which initial response is expected? A. Water leaves and pressure potential rises B. Water enters and…
Zadanie 20
Erythrocytes are placed in a strongly hypertonic solution of an effectively non-penetrating solute. What is expected initially? A. They lose water and shrink B. They gain water until they lyse C. They increase their mass by synthesizing a cell wall D. All…
Zadanie 2a
State the direction of net water movement across the membranes during the first three minutes.
- Materiał graficzny
Zadanie 2b
(i) Explain why the treated cells and control cells show different changes in volume. (ii) Discuss how aquaporins in human collecting ducts help when blood water content becomes too low.
- Materiał graficzny
Zadanie 20
A schematic records the shapes of mammalian red blood cells after immersion in a test solution. What can be deduced from their appearance? A. The external solution has a lower solute concentration and the cells have swollen B. The external solution is…
- Materiał graficzny
Zadanie 20
A plant cell equilibrates first in solution P and then in a more concentrated solution Q. Its appearances are shown. How do its water potential and pressure potential change from P to Q? A. Water potential rises; pressure potential rises B. Water potential…
- Materiał graficzny
Zadanie 4a
Explain changes in pressure and solute potential when an initially non-turgid root cell is put in a hypotonic solution.