Question

question 100 (0.5 points)
which statement is most true regarding blood vessels?
large plasma proteins cannot pass through any capillaries.
large plasma proteins can pass through fenestrated capillaries.
large plasma proteins can pass through sinusoidal capillaries.
large plasma proteins can pass through continuous capillaries.

Explanation:

To determine the correct statement, we analyze the permeability of different capillary types:

• Continuous capillaries: Tight junctions restrict large molecules (e.g., plasma proteins) from passing.
• Fenestrated capillaries: Fenestrations (pores) allow small molecules through but not large plasma proteins.
• Sinusoidal capillaries: Have large intercellular gaps and incomplete basement membranes, enabling large plasma proteins (and even cells) to pass.
• The first option is false (sinusoidal capillaries allow large proteins).

Thus, the only true statement is that large plasma proteins can pass through sinusoidal capillaries.

Answer:

C. Large plasma proteins can pass through sinusoidal capillaries. (Note: Assuming the third option is labeled "C" based on standard multiple-choice numbering; adjust the identifier if the original options use different labels.)