Porphyrins - Study guides, Class notes & Summaries

Carotenoids - lipid derivatives, produce pigments in plants and animals , An accessory pigment, either yellow or orange, in the chloroplasts of plants. By absorbing wavelengths of light that chlorophyll cannot, carotenoids broaden the spectrum of colors that can drive photosynthesis. Porphyrins - lipid derivatives, a group of light-sensitive, pigmented, ringed chemical structures that are required for the synthesis of hemoglobin. Complexed with metals usch as iron in hemoglobin and chloroph...

What is hemoglobin composed of? - CORRECT ANSWER 4 heme, 4 iron, 4 globins What disorder does a defect in heme synthesis lead to? - CORRECT ANSWER Porphyria Porphyria - CORRECT ANSWER Deficiency in the enzymes of the porphyrin pathway leads to insufficient production of heme. The principal problem in these deficiencies is the accumulation of porphyrins, the heme precursors, which are toxic to tissue in high concentrations. What is methemoglobin? - CORRECT A...

TEST BANK FOR TIETZ FUNDAMENTALS OF CLINICAL CHEMISTRY AND MOLECULAR DIAGNOSTICS 7TH EDITION BY CARL A. BURTIS. TABLE OF CONTENTS: I. PRINCIPLES OF LABORATORY MEDICINE 1. Clinical Chemistry, Molecular Diagnostics, and Laboratory Medicine 2. Selection and Analytical Evaluation of Methods — With Statistical Techniques 3. Clinical Evaluation of Methods 4. Evidence-Based Laboratory Medicine 5. Establishment and Use of Reference Values 6. Specimen Collection, Processing, and Other Preanalytical Var...

TEST BANK FOR TIETZ FUNDAMENTALS OF CLINICAL CHEMISTRY AND MOLECULAR DIAGNOSTICS 7TH EDITION BY CARL A. BURTIS. TABLE OF CONTENTS: I. PRINCIPLES OF LABORATORY MEDICINE 1. Clinical Chemistry, Molecular Diagnostics, and Laboratory Medicine 2. Selection and Analytical Evaluation of Methods — With Statistical Techniques 3. Clinical Evaluation of Methods 4. Evidence-Based Laboratory Medicine 5. Establishment and Use of Reference Values 6. Specimen Collection, Processing, and Other Preanalytical Var...

URINALYSIS AND BODY FLUIDS Questions MEASURE TOTAL VOLUME - ANSWERSAFTER RECEIVING A 24 HOUR URINE FOR QUANTITATIVE TOTAL PROTEIN ANALYSIS THE TECHNICIAN MUST FIRST EXPOSED TO LIGHT - ANSWERSFALSE RESULTS IN UROBILINOGEN TESTING MA OCCUR IF THE URINE SPECIMEN IS 4 BILIRUBIN - ANSWERSWHICH OF THE FOLLOWING URINE RESULTS IS MOST APT TO BE CHANGED BY PROLONGED EXPOSURE TO LIGHT? BACTERIAL CONTAMINATION WILL CAUSE ALKALINIZATION OF THE URINE - ANSWERSURINE SAMPLES SHOULD BE EXAMINED WITHIN ...

What is hemoglobin composed of? - 4 heme, 4 iron, 4 globins What disorder does a defect in heme synthesis lead to? - Porphyria Porphyria - Deficiency in the enzymes of the porphyrin pathway leads to insufficient production of heme. The principal problem in these deficiencies is the accumulation of porphyrins, the heme precursors, which are toxic to tissue in high concentrations. What is methemoglobin? -Methemoglobin is a form of hemoglobin that contains ferric [Fe3+] iron and has a decreas...

After receiving a 24-hour urine for quantitative total protein analysis, the technician must first: - Answer-Measure the total volume False results in urobilinogen testing may occur if the urine specimen is: - Answer-Exposed to light A clean-catch urine is submitted to the laboratory for routine urinalysis and culture. The routine urinalysis is done first, and 3 hours later, the specimen is sent to the microbiology department for culture. The specimen should: - Answer-Be rejected due to th...

Normal urine volume correct answers mL/day Polyuria correct answers >2500 mL/day Diabetes insipidus/mellitus, caffeine, diuretics Oliguiria correct answers <400 mL/day Dehydration, vomiting, diarrhea Anuria correct answers No urine output Kidney damage, decreased blood flow to kidneys Aldosterone correct answers Made in adrenal cortex; increases reabsorption of sodium by kidney tubules Arginine Vasopressin (AVP)/Antidiuretic Hormone (ADH) correct answers Made in posterio...

TEST BANK FOR TIETZ FUNDAMENTALS OF CLINICAL CHEMISTRY AND MOLECULAR DIAGNOSTICS 7TH EDITION BY CARL A. BURTIS. TABLE OF CONTENTS: I. PRINCIPLES OF LABORATORY MEDICINE 1. Clinical Chemistry, Molecular Diagnostics, and Laboratory Medicine 2. Selection and Analytical Evaluation of Methods — With Statistical Techniques 3. Clinical Evaluation of Methods 4. Evidence-Based Laboratory Medicine 5. Establishment and Use of Reference Values 6. Specimen Collection, Processing, and Other Preanalytical Var...

MEASURE TOTAL VOLUME - ANSWERSAFTER RECEIVING A 24 HOUR URINE FOR QUANTITATIVE TOTAL PROTEIN ANALYSIS THE TECHNICIAN MUST FIRST EXPOSED TO LIGHT - ANSWERSFALSE RESULTS IN UROBILINOGEN TESTING MA OCCUR IF THE URINE SPECIMEN IS 4 BILIRUBIN - ANSWERSWHICH OF THE FOLLOWING URINE RESULTS IS MOST APT TO BE CHANGED BY PROLONGED EXPOSURE TO LIGHT? BACTERIAL CONTAMINATION WILL CAUSE ALKALINIZATION OF THE URINE - ANSWERSURINE SAMPLES SHOULD BE EXAMINED WITHIN 1 HOUR OF VOIDING BECAUSE AT 4-7C ...