Q: Does "head" have the same meaning in the following two sentences?

Matters came to a head yesterday.

The head of the column advanced boldly.

A: different meanings

Q: Does "heart" have the same meaning in the following two sentences?

The heart and soul of the Republican Party.

They ran forward into the heart of the struggle.

A: different meanings

Q: Does "bed" have the same meaning in the following two sentences?

Slices of hard-boiled egg on a bed of spinach.

Lake bed.

A:
different meanings