A person with type A blood can safely donate RBCs to someone of type ________ and can receive RBCs from someone of type ________.
A. A; B
B. O; AB
C. AB; O
D. O; O
E. B; A
Answer: C
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Which of the following would be an indication that an individual is suffering from leukemia?
A. The hematocrit is greater than 50. B. The blood cells are an odd sickle shape. C. Examination of the blood reveals a large number of immature leukocytes. D. Examination of the blood reveals a large number of immature erythrocytes. E. The person has polycythemia.
How does surfactant reduce the surface tension of water in the lungs?
A. Reduces hydrogen bonding between water molecules B. Decomposes water C. Covers the alveoli D. All of the choices are correct.
Which of the following statements concerning vision is false?
A) Approximately half of the fibers in each optic nerve cross to opposite sides of the brain at the optic chiasm. B) Fibers of the optic nerve synapse at the lateral geniculates of the thalamus. C) The image that is formed on the retina is inverted. D) The entire retina receives equal representation in the visual cortex. E) The visual cortex of the brain receives the entire field of vision.
Primary lymphatic organs include the
A. tonsils and spleen. B. thymus and lymph nodes. C. red bone marrow and thymus. D. red bone marrow and lymph nodes.