O-LevelBiologyCoordination & Response5090/21 · May/June 2020 · Q112 Marks

The diagram shows the pathway taken by a hormone from cell A where it is produced to cell C that it affects. [Figure 1.1]

(a)(i)Identify the type of blood vessel B.[1]
(a)(ii)Explain the ways in which this type of blood vessel is adapted for the transport of hormone molecules.[4]
(a)(iii)State how molecules of the hormone are transported through blood vessel B.[2]
(b)For a named hormone, identify the gland containing cell A, an organ containing cell C and a function or effect of the hormone you have named. • named hormone • the gland containing cell A • an organ containing cell C • a function or effect of the named hormone[4]
(c)Cell C is one of a number of similar cells making up an organ. State the name given to organs affected by hormones.[1]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Mark scheme

Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.

[1] capillary;
[4] very small AW / narrow ; thin / one cell thick / leaky + walls ; runs close to the cells; very numerous / large surface area ; maximum uptake of hormone / maximum offloading of hormone AW ; by diffusion;
[2] in solution; in blood; plasma;
[4] (for example) insulin ; pancreas; liver / muscles ; glucose to glycogen / glycogen storage ;
[1] target (organ);

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