Homeostasis in living things is regulated by the action of? question 5 options: a. the nervous system, only b. the endocrine system, only c. both the nervous and endocrine systems d. neither the nervous nor the endocrine system

The correct answer is option D , "Neither the nervous nor the endocrine system"

Homeostasis is a self-regulating process which accounts for maintaining stability for the survival of an individual. The process through which stability is achieved is a dynamic process which continues until equilibrium is maintained. Through homeostatic regulations, all the processes of integration and function of balance (either mechanical, electrical, hormonal etc. )  are controlled and mediated.

b.

the tricuspid valve is present between right atrium and right ventricle