Most of the carbon dioxide present in blood in the form of:

1. Dissolved CO2 2. Carbonate 3. Bicarbonate ion 4. Carbonic acid

Calcium concentration in the serum is regulated by

1. Insulin 2. Parathyroid hormone 3. Thyroxine 4. Vitamin C

Fasting serum phosphate concentration is controlled primarily by the

1. Pancreas 2. Skeleton 3. Parathyroid glands 4. Small intestine

Total iron-binding capacity measures the serum iron transporting capacity of:

1. Hemoglobin 2. Cerruloplasmin 3. Transferrin 4. Fetritin

A hospitalized patient is experiencing increased neuromuscular irritability (tetany). Which of the following tests should be ordered immediately?

1. Calcium 2. Phosphate 3. BUN 4. Glucose

Quantitation of Na+ and K+ by ion selective electrode is the standard method because:

Serum "anion gap" is increased in patients with:

1. Renal tubular acidosis 2. Diabetic alkalosis 3. Metabolic acidosis due to diarrhea 4. Lactic acidosis

The buffering capacity of blood is maintained by a reversible exchange process between

1. Sodium 2. Potassium 3. Calcium 4. Chloride✔

In respiratory acidosis, a compensatory mechanism is the increase in

1. Respiratory rate 2. Ammonia formation 3. Blood PC02 4. Plasma bicarbonate concentration

The solute that contributes the most to the total serum osmolality is

1. Glucose 2. Sodium 3. Chloride 4. Urea

The first step in the quantitation of serum iron is

The first step in analyzing a 24-hour urine specimen for quantitative urine protein is:

The primary function serum albumin in the peripheral blood is to:

A low concentration of serum phosphorus is commonly found in:

A reciprocal relationship exists between

Which is the following is most likely to be ordered in addition to serum calcium to determine the cause of tetany?

1. Magnesium 2. Phosphate 3. Sodium 4. Vitamin

The regulation of calcium and phosphorus metabolism is accomplished by which of the following glands?

1. Thyroid 2. Parathyroid 3. Adrenal glands 4. Pituitary

Which percentage of total serum calcium is nondiffusible protein bound?

1.80%-90% 2.51%-60% 3.40%-50% 4.10%-30%

Sodium determination by indirect ion selective electrode is falsely decreased by

1. Elevated chloride levels 2. Elevated lipid levels 3. Decreased protein levels 4. Decreased albumin levels