Let's say you artificially meet or restrict the biological basis of the needs.
E.g. put the subject on a drip so that none of the hunger senses are triggered. Automatically manage the body's water balance with sensors and a feeding tube. Restrict them so that they can't hurt themselves to feel pain. Modulate their sexual hormones to inhibit sexual desire. Etc., etc.
E.g. put the subject on a drip so that none of the hunger senses are triggered. Automatically manage the body's water balance with sensors and a feeding tube. Restrict them so that they can't hurt themselves to feel pain. Modulate their sexual hormones to inhibit sexual desire. Etc., etc.
Do they stop being conscious?