Which of the following parts of a cell produces energy?
Lysosomes
Mitochondria
Nucleolus
Microvilli
The Correct Answer is B
A. Lysosomes: Lysosomes contain digestive enzymes that break down waste materials and cellular debris but are not responsible for energy production.
B. Mitochondria: Mitochondria are known as the "powerhouses" of the cell because they produce energy through cellular respiration.
C. Nucleolus: The nucleolus is involved in producing ribosomes and RNA synthesis, not energy production.
D. Microvilli: Microvilli increase the surface area of cells for absorption but do not produce energy.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Safety data sheet (SDS): SDS provides information on handling and disposing of hazardous materials, not specifically on infection control or disease prevention.
B. Standard precautions: Standard precautions are infection control practices used to prevent the spread of disease in healthcare settings, such as hand hygiene and using personal protective equipment.
C. CLIA: CLIA (Clinical Laboratory Improvement Amendments) regulates laboratory testing but does not specifically address disease prevention in patient interactions.
D. Exposure plan: An exposure plan is related to handling and reporting exposure to bloodborne pathogens, not general disease prevention.
Correct Answer is D
Explanation
A. "This test measures my estrogen serum ratio after menopause." ESR stands for erythrocyte sedimentation rate, not estrogen serum ratio. This is an incorrect interpretation of the test.
B. "This test measures the fluctuation of serum protein." The ESR does not directly measure serum protein levels. It measures the rate at which red blood cells sediment in a period of one hour.
C. "This test measures my hemoglobin levels." Hemoglobin levels are measured by a hemoglobin test, not an ESR. This statement is incorrect.
D. "This test measures the distance my RBCs have dropped." This is the correct understanding. ESR measures the rate at which red blood cells settle at the bottom of a test tube over a specified period, indicating the distance the RBCs have dropped.
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