A function 
is a pdf on the three-dimensional region Q if 
for all 
in Q and 
. Find k such that 
is a pdf on the region bounded by z = 0, z = 3, x = 0, x = 1, y - z = 0 , and y - z = 3.
Definitions:
Organophosphate Poison
Toxic chemicals found in certain pesticides and nerve agents that inhibit the function of acetylcholinesterase, leading to overstimulation of nerves.
Pacemaker Cells
Cells located in the heart that control the heart rate by generating impulses that travel through the heart, stimulating contractions.
Action Potentials
Electrical impulses that allow neurons to transmit information to other neurons, muscles, or glands.
Plasma Membrane
The biological membrane separating the interior of a cell from its external environment, composed of a phospholipid bilayer.
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