Lymph fluid is:
Red, like blood
Formed when fluid is filtered across the subclavian veins into the tissue spaces
Formed from tissue fluid
Pumped by the left heart into systemic circulation
The Correct Answer is C
A. Red, like blood:
Lymph is typically clear to pale yellow; it lacks red blood cells, which give blood its red color.
B. Formed when fluid is filtered across the subclavian veins into the tissue spaces:
Lymph forms from interstitial (tissue) fluid, not from fluid filtered from veins into tissues.
C. Formed from tissue fluid:
Lymph originates as interstitial fluid that enters lymphatic vessels and is transported back into the circulatory system.
D. Pumped by the left heart into systemic circulation:
Lymph is not pumped by the heart; it moves through the lymphatic system via muscle contractions and valves.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Digestive system through contaminated feces:
This is the port of exit for diseases spread by the fecal-oral route (e.g., cholera, hepatitis A).
B. Respiratory system by coughing or sneezing:
Droplet infections (e.g., flu, COVID-19, common cold) are primarily spread through respiratory secretions expelled via coughing or sneezing.
C. Central nervous system by contaminated cerebral spinal fluid:
While CSF can carry infections (e.g., meningitis), it is not a common port of exit.
D. Urinary system by contaminated urine:
Urinary tract infections may be transmitted this way, but not typically through droplets.
Correct Answer is A
Explanation
A. Tonsils:
Tonsils are lymphatic tissues located in the pharyngeal region; they are partially encapsulated and help trap airborne or ingested pathogens.
B. Thyroid gland:
The thyroid is an endocrine gland that regulates metabolism, not part of the lymphatic system.
C. Thymus gland:
The thymus is fully encapsulated and located in the mediastinum; it matures T cells.
D. Spleen:
The spleen is a fully encapsulated lymphoid organ located in the left upper quadrant of the abdomen.
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