. Correctly label the parts of centrifuged blood.
- A. dropdown
- B. dropdown
- C. dropdown
The Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"A","dropdown-group-3":"C"}
A. Plasma: The pale, straw-colored fluid at the top after centrifugation; it contains water, dissolved proteins (albumin, clotting factors), nutrients, hormones and electrolytes and is about ~55% of whole blood.
B. Buffy coat: The thin, whitish layer that sits between the top plasma and the bottom red cell layer after centrifugation; it contains leukocytes (WBCs) and platelets and makes up <1% of whole blood.
C. Erythrocytes: The dense red layer that settles at the bottom (the hematocrit); composed of red blood cells containing hemoglobin, typically about ~45% of whole blood and responsible for O₂/CO₂ transport.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"C"}
Explanation
A. thymus: The thymus secretes thymic hormones (immune function) - it does not control metabolic rate or fetal neural development.
B. parathyroid gland: The parathyroids secrete PTH to regulate calcium - not metabolic rate or alertness.
C. thyroid gland: The thyroid secretes T3/T4 which increase basal metabolic rate, enhance alertness and reflexes, and are critical for fetal nervous system development.
D. pancreas: The pancreas secretes insulin and glucagon regulating glucose metabolism, not primarily metabolic rate/alertness in the sense described.
Correct Answer is A
Explanation
True: Transfusion incompatibility arises when plasma antibodies in the recipient (or donor plasma) recognize foreign RBC antigens and cause agglutination/hemolysis.
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