Which structure permits the diffusion of insulin from the blood to fibroblasts

Explanation:

Insulin transport from the bloodstream to its target cells requires transport across a vascular endothelial barrier. This step is regulated by many factors, including pericytes. Similarly, insulin transport from β-cells to the bloodstream requires efficient access to the vasculature.

b.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: