Media Lab#1

8-Hydroxyquinoline and Ortho-Cresolphthalein complexone (CPC) reagent is commonly used in the determination of: Please select the single best answer Phosphorus Magnesium Chloride Calcium

Calcium

The measurement of sodium and chloride in the sweat is the most useful test for the diagnosis of what condition/disease? Please select the single best answer Steatorrhea Direct determination of the exocrine secretory capacity of the pancreas. Cystic fibrosis Zollinger-Ellison syndrome

Cystic fibrosis

In which of the following condition(s) would an increased serum osmolality be an expected finding? Please select the single best answer Dehydration and Diabetes insipidus Hyponatremia and Dehydration Increased arginine vasopressin hormone (AVP formerly ADH) secretion and in Hyponatremia AVP and Diabetes insipidus

Dehydration and Diabetes insipidus

A patient has the following serum results: Na = 130 mEq/L K = 4.9 mEq/L Cl = 107 mEq/L Glucose = 300 mg/dL BUN = 18 mg/dL Creatinine = 1.1 mg/dL Which osmolality result is consistent with these results?. Note: There are various published versions of this particular equation that will produce slightly different results (choose the value closest to your calculated result). Please select the single best answer 240 mosmol/kg 251 mosmol/kg 281 mosmol/kg 293 mosmol/kg

281 mosmol/kg

A patient's electrolyte results are the following: Sodium = 145 mmol/L Chloride = 113 mmol/L Bicarbonate = 24 mmol/L Calculate the anion gap for this patient and choose the correct answer below. The correct answer is highlighted below 32 mmol/L 8 mmol/L 27.7 mmol/L 3.7 mmol/L

8 mmol/L

What are the expected results of the laboratory markers in iron deficiency anemia? The correct answer is highlighted below A) Decreased serum iron, increased transferrin, decreased ferritin, decreased percent saturation, and increased total iron-binding capacity. B) Decreased serum iron, decreased transferrin, decreased ferritin, variable percent saturation, and decreased total iron-binding capacity. C) Decreased serum iron, decreased transferrin, increased ferritin, decreased percent saturation, and decreased total iron-binding capacity. D) Decreased serum iron, normal or decreased transferrin, normal or increased ferritin, decreased percent saturation, and normal or decreased total iron-binding capacity.

A

Ion-selective electrodes, for pH determinations, are called selective rather than specific because they actually measure the: The correct answer is highlighted below Activity of one ion only Concentration of one ion Activity of one ion much more than other ions present Concentration and activity of one ion only

Activity of one ion much more than other ions present

A Comprehensive Metabolic Panel (CMP) consists of which group of tests? A) Cholesterol, Lipoprotein, HDL, Triglycerides B) Albumin, Glucose, BUN, Creatinine, Sodium, Potassium, Chloride, CO2, AST, ALT, Alkaline Phosphatase, Total Protein, Total Bilirubin, Calcium C) Potassium, Sodium, Chloride, CO2 D) AST, ALT, Alkaline Phosphatase, Total Protein, Albumin, Total Bilirubin, Direct Bilirubin

B

What changes in potassium and sodium serum results may occur with diuretic use? Please select the single best answer Decrease in both. Increase in both. Increase in potassium and decrease in sodium. Decrease in potassium and increase in sodium.

Decrease in both.

Which of the following sets of results is indicative of stage 3 iron deficiency (iron deficiency anemia)? Please select the single best answer Decreased ferritin, normal soluble transferrin receptor (sTfR), slightly increased total iron-binding capacity (TIBC) Decreased ferritin, increased sTfR, increased TIBC Decreased ferritin, increased sTfR, decreased TIBC Increased ferritin, normal sTfR, increased TIBC

Decreased ferritin, increased sTfR, increased TIBC

Which of the following are terms used to describe storage pool iron? Please select the single best answer Hemosiderin and myoglobin Ferritin and hemosiderin Hemopectin and hemoglobin Apoferritin and transferrin

Ferritin and hemosiderin

Which of the following forms of calcium is biologically active: The correct answer is highlighted below Protein-bound calcium Non-ionized calcium Calcium carbonate Free ionized calcium

Free ionized calcium

A Basic Metabolic Panel (BMP) consists of which group of tests? Please select the single best answer AST, ALT, Alkaline Phosphatase, Total Protein, Albumin, Total Bilirubin, Direct Bilirubin Cholesterol, Lipoprotein, HDL, Triglycerides Glucose, BUN, Creatinine, Sodium, Potassium, Chloride, CO2, Calcium Potassium, Sodium, Chloride, CO2

Glucose, BUN, Creatinine, Sodium, Potassium, Chloride, CO2, Calcium

A specimen for potassium was drawn in a tube without anticoagulant at 6 AM during a traumatic patient stick. The results were 6.0 mmol/L. Why are the results elevated? The correct answer is highlighted below Specimen should have been drawn with anticoagulant Exposure to light Hemolysis of the RBC's Analyzer systematic error

Hemolysis of the RBC's

What would you expect the serum iron (SI) and total iron-binding capacity (TIBC) to be in a person with hereditary hemochromatosis (HH)? The correct answer is highlighted below Increased SI and decreased TIBC Decreased SI and decreased TIBC Decreased SI and increased TIBC Increased SI and increased TIBC

Increased SI and decreased TIBC

When evaluating a patient for a suspected Wilson's Disease diagnosis, decreased concentrations of ceruloplasmin would be expected along with: Please select the single best answer Decreased urine copper Increased urine copper Normal urine copper Increased serum coppe

Increased urine copper

Which of the following analytes will be falsely increased due to hemolysis? Please select the single best answer Hemoglobin, Hematocrit, Red Blood Cell Count Hematocrit, Red Blood Cell Count, Potassium Potassium, Magnesium, Iron, Total Protein Hemoglobin, Hematocrit, Magnesium, Iron, Total Protein

Potassium, Magnesium, Iron, Total Protein

Which of the following is the most common cause of hyperkalemia in hospitalized patients? The correct answer is highlighted below Cellular injury Therapeutic potassium replacement Chemotherapy Leukemia

Therapeutic potassium reaction

In healthy individuals, calcitonin is synthesized by which cells in the body? The correct answer is highlighted below Hepatocytes Leukocytes Thyroid C cells Red blood cells

Thyroid C cells

Total iron-binding capacity measures the serum iron transporting capacity of: The correct answer is highlighted below Hemoglobin Transferrin Ferritin Ceruloplasmin

Transferrin

A hospitalized patient has a decreased serum copper level and increased urine copper level. This is MOST consistent with: The correct answer is highlighted below Wilson's disease Addison's disease Parathyroid disease Not clinically significan

Wilson's disease

When iontophoresis is used to collect sweat for chloride analysis, pilocarpine is used to: The correct answer is highlighted below Clean the skin area Complex with chloride Stimulate nervous system Induce the sweat secretion

induce the sweat secretion

A liquid ion-exchange membrane electrode using the antibiotic valinomycin is MOST selective for: Please select the single best answer Sodium Glucose Chloride Potassium

potassium

The presence of only slightly visible hemolysis will significantly increase the serum level of which of the following electrolytes? The correct answer is highlighted below Sodium Potassium Chloride Bicarbonate

potassium

All of the following analytes would be significantly increased in a plasma sample due to hemolysis, EXCEPT? The correct answer is highlighted below Potassium LDH Sodium AST

sodium