What is the difference between "bend" and "turn"?

[Igor]

Common Errors in English, Advanced Level

ESL/EFL Test #9 "This way and that", question 2

I can go into a shop down the street, come out and then not know which way to bend to continue my journey down the road.

(a) into
(b) down
(c) not know
(d) bend

Common Errors in English, Advanced Level

ESL/EFL Test #9 "This way and that", answer 2

I can go into a shop down the street, come out and then not know which way to turn to continue my journey down the road.

Correct entry: turn
The error was: (d) bend
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What is the difference between "bend" and "turn"?

Igor

[Mister Micawber]

.
We 'turn', and do not 'bend', in our journeys.
.
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Native English teacher at Mister Micawber's

[Conchita]

Roads, however, can bend or make bends:

- The road bends around the side of the mountain.
- The road makes several bends.

[Lost_Soul]

Or you can send (or drive) somebody round the bend (twist) when you make them really angry