Leukocytes can undergo diapedesis. What is diapedesis?
The formation of a network of fibrin fibers.
The release of the contents of cytoplasmic granules.
The ability to rapidly divide, increasing the number of a particular type of leukocyte.
The ability of cells to squeeze between cells of capillary walls.
The Correct Answer is D
A. The formation of a network of fibrin fibers: This describes fibrin clot formation/coagulation, not diapedesis.
B. The release of the contents of cytoplasmic granules: This is degranulation (e.g., in mast cells, neutrophils), not diapedesis.
C. The ability to rapidly divide, increasing the number of a particular leukocyte: This describes cell proliferation, not diapedesis.
D. The ability of cells to squeeze between cells of capillary walls: Diapedesis -leukocytes migrating out of the bloodstream by squeezing between endothelial cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B"]
Explanation
A. Filter lymph: lymph nodes physically and biologically filter lymph, trapping pathogens and debris.
B. Immune surveillance: lymph nodes house lymphocytes and antigen-presenting cells that monitor for and respond to foreign antigens.
C. Produce macrophages: lymph nodes contain macrophages (and support their activity), but macrophages differentiate from monocytes in tissues; nodes are not typically described as producing macrophages de novo.
D. Filter blood: the spleen primarily filters blood; lymph nodes filter lymph, not systemic blood.
Correct Answer is C
Explanation
A. Decreased CO₂ and hydrogen ion concentrations and increased oxygen concentration stimulate her chemoreceptors, triggering inspiration. - Chemoreceptors respond to increased CO₂/decreased O₂.
B. The inflation reflex would not allow her to keep her lungs full of air for a prolonged period. The reflex would trigger inspiration. -The Hering–Breuer reflex prevents overinflation, not relevant here.
C. Increased CO₂ and hydrogen ion concentrations and decreased oxygen concentration stimulate her chemoreceptors, triggering inspiration. -Rising CO₂ strongly stimulates medullary chemoreceptors → involuntary breathing resumes.
D. The diaphragm will begin to fatigue and will not be able to hold its contracted position for more than a short period of time. -Breathing resumes due to chemoreceptor drive before muscle fatigue sets in.
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