The same details as their mother.
The correct answer here is "cell membrane". Generally it makes sure that nothing enters or leaves the cell, except by its highly guarded "gates", such as ion channels, that let some particles through - but they're very picky about whom to let in!
D - Allow pH to change drastically.
The reason that we have buffer in our system is to protect AGAINST sudden change of pH
<span>The opiates are highly addictive drugs that suppress physical sensation and responsiveness to stimulation.
Opiates is a </span>a medication/drug with morphinelike impacts.
