Question: "head" used in the same way in the following two sentences?

Under the head of minor Roman poets.

They shot 20 head of quail.
Answer: different meanings
Question: "look" used in the same way in the following two sentences?

He went out to have a look.

His camera does his looking for him.
Answer: the same meaning
Question: "operation" used in the same way in the following two sentences?

The cognitive operation of remembering.

A multinational operation.
Answer: different meanings
Question: "mystery" used in the same way in the following two sentences?

How it got out is a mystery.

The truth behind the events remains a mystery.
Answer:
the same meaning