An apostrophe is added to contractions.
There is no contraction (no apostrophe is used). The slang short form is kinda.
Isometric contraction
It's a contraction of "can" and "not".
A contraction.
isometric
This seems to be the reverse of a different spelling error.The colloquial adverb term is spelled "kind of" meaning "slightly" or somewhat.The common spelling error should of is a misspelling of the informal contraction should've (should have).
Smooth muscle is responsible for the contraction that moves limbs.
Muscle
"It's" is a contraction for "it is" or "it has," which are present tense verb phrases.
isometric
it is a contraction for "a el" which means "at the". kind of like how in English you say "can't" instead of "cannot"
she is on a no added salt diet