Zadanie 4b
Monosaccharides enter a dense network of intestinal blood capillaries. Describe adaptations of capillaries for exchanging these small molecules.
Capillary structure and rapid exchange
Relate narrow branching vessels, thin walls and pores to the exchange of substances with tissues.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2022–2025.
Zadania sprawdzające tę umiejętność: 5 Otwórz w wyszukiwarce z filtrami
Zadanie 26
Which capillary adaptation most directly allows exchange between blood and surrounding tissues? A. A very thin permeable wall B. An impermeable lining that prevents dissolved molecules leaving the blood C. A wall made of several layers of calcified cells D.…
Zadanie 4b
At low magnification, a section of tissue shows large arteries and veins but no capillaries can be resolved. Suggest why capillaries are not visible.
Zadanie 2b
Hormones cross capillary walls between blood and tissues. Outline two capillary adaptations that facilitate substance exchange.
Zadanie 25
Which component is present in the walls of both veins and blood capillaries? A. A thick continuous layer of elastic fibres B. Endothelial cells C. Several layers of smooth muscle cells D. Valve leaflets throughout every vessel