physiological reaction vs knee-jerk reflex

Other hyponyms of physiological reaction include accommodation reflex, Babinski, Babinski reflex, Babinski sign, belch, belching, burp, burping, eructation, blink, blinking, eye blink, nictation, nictitation, wink, winking, blush, flush, disgorgement, emesis, puking, regurgitation, vomit, vomiting, defecation reflex, rectal reflex, oscitance, oscitancy, yawn, yawning, electric shock, electrical shock, shock, breaking wind, fart, farting, flatus, wind, gulp, gulping, knee jerk, patellar reflex, light reflex, miosis, myosis, pupillary reflex, mydriasis, micturition reflex, gag reflex, pharyngeal reflex, goose bump, goose pimple, goose skin, goosebump, gooseflesh, horripilation, pilomotor reflex, plantar reflex, rooting reflex, jump, start, startle, myotactic reflex, stretch reflex, suckling reflex, shake, shiver, tremble, sneeze, sneezing, sternutation, hiccough, hiccup, singultus.