PCAT

the period of closed-eye rest usually taken at night

area which allows passage of substances into cytoplasm and back

simple chemical that living things need in small amounts to stay healthy

the force within the cardiovascular system

the amount of a substance within a second substance, usually in a solution

chemical that changes color as the pH changes

enzyme hydrolyzing starch into sugar

a substance that induces a reaction or effect

an organic compound that has two acyl groups bound to the same oxygen atom

held up; put off to a later time

unfinished stage of growth or development; unripe; childish

stiff; very hard

sodium chloride; white powder used for seasoning food

epiphysis

the outer membranes that surround the brain

a very harmful poison made by a bacterial cell and released to the surroundings

condition characterized by a bent penis

this is the amount of stimulus needed to set up an action potential in a nerve cell

metallic element like platinum

medical care; therapy

pattern that determines when and how much of a drug or medication should be consumed by a patient