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 A
Explanation
A. To produce antibody molecules: plasma cells are differentiated B cells specialized for synthesizing and secreting antibodies.
B. To directly attack cells displaying antigens: cytotoxic T lymphocytes (and NK cells) directly attack antigen-bearing cells; plasma cells primarily secrete antibodies.
C. To increase the volume of the blood plasma: plasma cell activity does not change plasma volume; they produce proteins (antibodies), not fluid volume.
D. To produce interferon: many cell types secrete interferons in response to viral infection (e.g., infected cells, immune cells), but plasma cells are dedicated antibody producers.
Correct Answer is C
Explanation
A. Bone marrow and the thymus: those are organs/tissues involved in blood cell production/maturation, not the formed elements themselves.
B. Blood and lymph: these are fluid compartments, not the formed cellular elements suspended in blood.
C. Blood cells and platelets: “formed elements” refers to erythrocytes, leukocytes, and platelets (the cellular/fragment components of blood).
D. Sodium and potassium: those are electrolytes/ions in plasma, not formed cellular elements.
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