Which of the following are incorrectly paired?

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Question restatement: The prompt asks which of the following are incorrectly paired with capillary characteristics.
Option 1: 'Fenestrated capillaries: Pores' This pairing is accurate because fenestrated capillaries possess fenestrations (pores) that allow selective passage of substances; thus this is a correct pairing.
Option 2: 'Fenestrated capillaries: Incomplete basement membrane' This is the incorrect pairing. Fenestrated capillaries typically have a continuous basement membrane; the idea of an incomplete basement membrane is characteristic of sinusoid capillaries, not fenestrated ones. The basement membrane in fenestrated vessels is not fragmented or incomplete.
Option 3: 'Sinusoid capillary: Incomplete basement membrane' This pairing is correct. Sinusoid capillaries are known for having an incomplete or discontinuous basement membrane, which facilitates extensive exchange between blood and surrounding tissues.
Option 4: 'Continuous capillaries: Small intercellular clefts' This is correct. Continuous capillaries have tight endothelial junctions with small intercellular clefts, permitting limited paracellular transport.
Option 5: 'Sinusoid capillary: Large intercellular clefts' This is also correct. Sinusoids possess large intercellular gaps or clefts that allow large molecules to pass between the blood and surrounding tissue.
In summary, among the options provided, the only incorrect pairing is Option 2 because fenestrated capillaries do not have an incomplete basement membrane; they typically retain a complete basement membrane, whereas sinusoid capillaries are the ones with incomplete basement membranes. The other pairings align with established morphological features of each capillary type.

Human Biology: from Cells to Systems (1001NSC_3251) Workshop #4 Quiz 2025

Which of the following are incorrectly paired?

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