reflex vs physiology

reflex and physiology both are nouns.

Word	Noun	Adjective	Verb	Adverb
reflex	Yes	Yes	No	No
physiology	Yes	No	No	No

reflex (noun)	physiology (noun)
an automatic instinctive unlearned reaction to a stimulus	processes and functions of an organism
	the branch of the biological sciences dealing with the functioning of organisms

reflex (adjective)	physiology (adjective)
without volition or conscious control