Which blood vessels branch directly off of the aorta at the level of the aortic semilunar valves?
A. Great cardiac veins
B. Right and left pulmonary arteries
C. Brachiocephalic arteries
D. Right and left subclavian arteries
E. Right and left coronary arteries
Answer: E
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Which of the following is not true regarding sickle-cell disease?
A. It is caused by a recessive allele that modifies the structure of hemoglobin. B. It is due to a hereditary hemoglobin defect. C. It is advantageous in that it can protect carriers against malaria. D. It is a cause of malaria. E. It is a cause of anemia.
If a person is normovolemic and consumes a large quantity of a hyperosmotic solution, it will
A) have no effect on cell osmolarity and thereby cell size. B) cause cells to swell due to an increase in the osmolarity of extracellular fluid. C) cause cells to shrink due to an increase in the osmolarity of extracellular fluid. D) cause cells to swell due to a decrease in the osmolarity of extracellular fluid. E) cause cells to shrink due to a decrease in the osmolarity of extracellular fluid
Define corticospinal tracts
A) Corticospinal tracts are ascending tracts that carry information or commands from the sensory nuclei in the brainstem to the cerebral cortex. B) Corticospinal tracts are descending tracts that carry information or commands from the cerebral cortex to motor nuclei in the brainstem. C) Corticospinal tracts are ascending tracts that carry sensory information from the anterior gray horns of the spinal cord to the cerebral cortex. D) Corticospinal tracts are descending tracts that carry motor commands from the cerebral cortex to the anterior gray horns of the spinal cord. E) Corticospinal tracts are ascending tracts that receive sensory information from the internal ear about the position and movement of the head.
Generally, the right renal artery will arise from the descending aorta before the left.
Answer the following statement true (T) or false (F)