ATI RN
Lymphatic System Questions and Answers PDF Questions
Question 1 of 5
The thoracic duct of the lymphatic system pours its contents into the
Correct Answer: B
Rationale: The thoracic duct empties lymph into the left subclavian vein, returning it to the bloodstream.
Question 2 of 5
tonsil is paired of oval mass of lymph tissue at lateral wall.
Correct Answer: C
Rationale: Palatine tonsils are paired oval masses at the lateral oropharyngeal wall.
Question 3 of 5
Regarding the lymphatic capillaries, choose the correct statement:
Correct Answer: A
Rationale: Lymphatic capillaries are made of a single endothelial layer ; they are more permeable, lack tight junctions, and have no pericytes.
Question 4 of 5
Emil von Behring developed the 'serum therapy', a treatment that offered protection against diphtheria. The basis for this therapy was the immunization of horses with diphtheria toxin, after which the serum of the horses was taken and used to treat diphtheria-infected individuals. Paul Ehrlich postulated that side-chains were responsible for this effect. What did those side-chains turn out to be?
Correct Answer: B
Rationale: Serum therapy relies on antibodies produced in horses that bind and neutralize diphtheria toxin; complement and phagocytes play roles in immunity but aren't the primary 'side-chains' Ehrlich identified.
Question 5 of 5
What is the role of IFN-γ in activating macrophages?
Correct Answer: B
Rationale: IFN-γ activates macrophages by signaling invader presence ; it enhances killing (A indirectly), doesn't directly increase lysosomes , and TNF production is a result.