physiologic drives

phys·i·o·log·i·c drives

those drives such as hunger and thirst that stem from the biologic needs of an organism.
Synonym(s): primary drives

phys·i·o·log·i·c drives

(fiz'ē-ŏ-loj'ik drīvz)
Those drives (e.g., hunger and thirst) that stem from the biologic needs of an organism.