What is vasodilation?
Compression of a vein because of muscle contraction.
An increase in the diameter of a blood vessel.
Contraction of the ventricles which increases ventricular pressure.
A decrease in the diameter of a blood vessel.
The Correct Answer is B
A. Compression of a vein because of muscle contraction: That’s mechanical venous compression (skeletal muscle pump), not vasodilation.
B. An increase in the diameter of a blood vessel: Definition of vasodilation.
C. Contraction of the ventricles which increases ventricular pressure: That describes ventricular systole, not vasodilation.
D. A decrease in the diameter of a blood vessel: That is vasoconstriction, the opposite of vasodilation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Right lymphatic duct: the right lymphatic duct drains only the right upper quadrant (right head/neck, right arm, right thorax), not the majority of the body.
B. Jugular trunk: the jugular trunk drains head/neck regions; it does not itself drain the majority of the body.
C. Subclavian trunk: the subclavian trunk drains upper limbs; it is a trunk, not the single duct that collects most lymph from the body.
D. Thoracic duct: the thoracic duct collects lymph from the lower body, abdomen, left thorax, left head/neck, and left arm (the majority of the body) and empties into the left subclavian vein.
Correct Answer is B
Explanation
A. Leukocytes: leukocytes are white blood cells; their breakdown does not produce biliverdin/bilirubin.
B. Hemoglobin: the heme portion of hemoglobin is degraded to biliverdin and then bilirubin (these are heme-breakdown pigments).
C. Foreign pathogens: pathogen breakdown is not the source of these pigments.
D. Erythropoietin: erythropoietin is a hormone that stimulates RBC production; it is not broken down into biliverdin/bilirubin.
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