________ Occasionally, urine will appear a brown or black color, which may indicate bleeding either in the urinary tract or from menstruation

Each gram of ________ provides 9 kcal

Fill in the blank(s) with correct word

The time required for plasma serum concentration levels of an absorbed and distributed drug to decrease by one-half is known as its:

a. Half-life. b. ED50. c. Max 50. d. Life 50.