The heartbeat slows in reaction to emotional stress.
A newborn. As you get older, your heartbeat rate slows.
Beta blockers such as atenolol/propanalol.
Catalyst
It slows down your reaction times :)
The rate of the reaction slows down
The substance that slows down a chemical reaction is an inhibitor. Instead you could also call an inhibitor an anticatalyst.-anticatalyst `antee'katlist1. (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst
An inhibitor decreases the reaction rate
The opposite of a catalyst is an inhibitor, something that suppresses or slows a reaction.
It slows and then stops.
it slows down
inhibitor
Exactly the opposite. It SLOWS your reflexes and reaction times.