A substance that produces a prolonged prothrombin time when given orally is

1. Protamine sulfate 2. Coumadin 3. Heparin 4. Saliclate

A variety of media may be safely stored for months is care is taken to

1. Retain their moisture 2. Avoid exposing them to light 3. Maintain them at room temperature 4. Maintain them in an incubator

Most methods for the determination of reaction of creatinine and blood creatinine are based on the

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