Section II

Questions 13 - 18

Question 13
36/5

The angles JNK and LNM are equal as they are vertically opposite.
Also the angle KJL = JLM (alternate between parallel lines).
So JK/ML = NK/MN; 5/12 = 3 /MN

Question 14
A

As the gastrocnemius muscle contracts, it pulls the heel bone up, and the foot hinges down.

Question 15
C

This is a test of Le Chatelier’s principle. If the pressure is increased the equilibrium will try to decrease it. So equilibrium moves to RHS. The rate increases as more particles in a smaller volume, so more collisions.

Question 16
B

Vessel X is a vein (and vessel Y is an artery), because X has a thinner wall and a wider lumen. Since X is a vein, it will contain valves, and will carry blood back towards the heart.

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