AP BIOLOGY

ANIMAL PHYSIOLOGY

EXCRETION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is true about dipsticks?
A
monitor blood glucose concentration quicker
B
the more glucose present, the darker it will be
C
measure pH, glucose, ketones and proteins
D
greater reading = more glucose present
Explanation: 

Detailed explanation-1: -Definition. The urine protein dipstick test measures the presence of proteins, such as albumin, in a urine sample. Albumin and protein can also be measured using a blood test .

Detailed explanation-2: -The protein test is based on a change in color of a pH indicator (e.g. tetrabromophenol blue) in the presence of varying concentrations of protein when the pH is held constant. The reagent pad contains the indicator and a buffer that holds the pH of the pad at approximately 3. Yellow indicates undetectable protein.

Detailed explanation-3: -Protein in the urine is not usually obvious, but can be detected by a simple dip-stick test, or sometimes by more sensitive lab tests. The presence of protein in the urine can act as a warning signal that not all is well with the kidneys. Usually there are no symptoms.

Detailed explanation-4: -Principle. The test is based on the “protein error” principle of indicators. The test zone is buffered to a constant pH value and changes color from yellow to greenish blue in the presence of albumin. Other proteins are indicated with less sensitivity.

There is 1 question to complete.