Since I keep seeing partially-informed comments about 737 pitch controls here's some notes and terms and links: It's not obvious, it's not simple, and other planes work in other ways - you can not just assume the 737MAX is like them.
The 737 horizontal tail externally looks like 3 moving parts:front-to-back (and large to small) is: Stabilizer : Elevator : Balance Tab.
Stabilizer moves in response to trim - this is what we are mostly looking at.
Elevator moves in response to the control column.
Balance tab has several modes depending on flaps and hydraulic system
health - but it mostly serves to offset aerodynamic force on the elevator in case the hydraulics fail and the elevator has to be controlled manually.
(there is one other pitch control, I learned - the spoilers on the wing can give some help in landing in case the elevator controls fail.)
There are many modes of operation and simple generalizations will not help.
The 737 horizontal tail externally looks like 3 moving parts:front-to-back (and large to small) is: Stabilizer : Elevator : Balance Tab.
see here: http://www.b737.org.uk/flightcontrols.htm#Pitch
Stabilizer moves in response to trim - this is what we are mostly looking at.
Elevator moves in response to the control column.
Balance tab has several modes depending on flaps and hydraulic system health - but it mostly serves to offset aerodynamic force on the elevator in case the hydraulics fail and the elevator has to be controlled manually.
(there is one other pitch control, I learned - the spoilers on the wing can give some help in landing in case the elevator controls fail.)
There are many modes of operation and simple generalizations will not help.