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CLT 3040 Final Exam Study Guide (verified) 2024
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CLT 3040 Final Exam Study Guide (verified) 2024 Course
CLT 3040
Question 1: Blood Composition
1. Question: What percentage of blood is made up of plasma?
o A) 45%
o B) 55%
o C) 60%
o D) 40%
Answer: B) 55%
Rationale: Plasma constitutes approximately 55% of total blood volume, with the
remaining 45% being formed elements like red blood cells, white blood cells, and
platelets.
Question 2: Hemostasis
2. Question: What is the first step in the hemostasis process?
o A) Fibrin clot formation
o B) Platelet aggregation
o C) Vascular spasm
o D) Coagulation cascade activation
Answer: C) Vascular spasm
Rationale: The first response to vascular injury is vascular spasm, which reduces
blood flow and blood loss, followed by the activation of platelets and the coagulation
cascade.
Question 3: Blood Tests
3. Question: Which test is used to monitor anticoagulant therapy with warfarin?
o A) aPTT
o B) PT/INR
o C) CBC
o D) Fibrinogen
Answer: B) PT/INR
Rationale: Prothrombin Time (PT) and International Normalized Ratio (INR) are
used to monitor the effectiveness of warfarin therapy in preventing blood clots.
,Question 4: Microbiology
4. Question: What is the primary purpose of the Gram stain?
o A) To identify viral infections
o B) To determine the oxygen requirement of bacteria
o C) To classify bacteria into Gram-positive and Gram-negative
o D) To visualize fungal elements
Answer: C) To classify bacteria into Gram-positive and Gram-negative
Rationale: The Gram stain differentiates bacteria based on their cell wall structure,
which informs treatment decisions.
Question 5: Immunology
5. Question: Which cells are primarily responsible for the humoral immune response?
o A) T-cells
o B) B-cells
o C) Macrophages
o D) Neutrophils
Answer: B) B-cells
Rationale: B-cells are responsible for producing antibodies that bind to antigens,
marking them for destruction by other immune cells.
Question 6: Laboratory Safety
6. Question: What is the primary purpose of Material Safety Data Sheets (MSDS)?
o A) To provide information on lab equipment
o B) To ensure laboratory safety and compliance
o C) To outline proper disposal methods
o D) To inform about chemical hazards
Answer: D) To inform about chemical hazards
Rationale: MSDS provide critical information about chemical properties, hazards,
handling, and emergency measures, ensuring laboratory personnel can work safely
with these substances.
Question 7: Biochemistry
, 7. Question: What is the primary role of enzymes in biochemical reactions?
o A) To increase the temperature of reactions
o B) To act as substrates
o C) To lower activation energy
o D) To serve as end products
Answer: C) To lower activation energy
Rationale: Enzymes are catalysts that lower the activation energy required for
biochemical reactions, increasing the rate of the reactions without being consumed.
Question 8: Quality Control
8. Question: What is the purpose of running quality control samples in the laboratory?
o A) To save time in testing
o B) To ensure accuracy and reliability of test results
o C) To minimize equipment maintenance
o D) To validate personnel training
Answer: B) To ensure accuracy and reliability of test results
Rationale: Quality control samples help confirm that laboratory testing procedures
are producing accurate and reliable results, essential for patient care.
Question 9: Hematology
9. Question: Which component of a complete blood count (CBC) provides information
about the body’s oxygen-carrying capacity?
o A) White blood cells
o B) Hemoglobin
o C) Platelets
o D) Hematocrit
Answer: B) Hemoglobin
Rationale: Hemoglobin levels indicate the blood's oxygen-carrying capacity, which is
crucial for diagnosing anemia and other blood disorders.
Question 10: Pathogen Identification
10. Question: Which method is commonly used for the identification of mycobacteria?
o A) Blood culture
o B) Acid-fast staining
, o C) Gram staining
o D) Enzyme-linked immunosorbent assay (ELISA)
Answer: B) Acid-fast staining
Rationale: Acid-fast staining is used to identify mycobacteria, such as
Mycobacterium tuberculosis, due to their waxy cell walls, which resist Gram staining.
Question 11: Cellular Respiration
11. Question: What is the main product of aerobic respiration?
o A) Lactic acid
o B) Ethanol
o C) ATP
o D) Acetyl-CoA
Answer: C) ATP
Rationale: Aerobic respiration primarily produces ATP through the processes of
glycolysis, the Krebs cycle, and the electron transport chain, utilizing oxygen as the
final electron acceptor.
Question 12: Antimicrobial Agents
12. Question: Which class of antibiotics is primarily effective against gram-negative
bacteria?
o A) Penicillins
o B) Tetracyclines
o C) Aminoglycosides
o D) Macrolides
Answer: C) Aminoglycosides
Rationale: Aminoglycosides are particularly effective against gram-negative bacteria
due to their ability to penetrate the outer membrane and inhibit protein synthesis.
Question 13: Blood Type
13. Question: What determines a person's blood type?
o A) Presence of antibodies
o B) Genetic makeup of antigens on red blood cells
o C) Volume of blood in the body
o D) Age of the individual
Answer: B) Genetic makeup of antigens on red blood cells
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