Which of the following requires another living host for its continued existence?
Worm
Fungi
Arthropod
Virus
The Correct Answer is D
A. Worm
Worms (helminths) are parasitic but can live independently of a host temporarily in certain environments.
B. Fungi
Fungi can survive and reproduce in non-living environments like soil or dead organic matter.
C. Arthropod
Arthropods (e.g., mosquitoes, ticks) can live freely and act as vectors but do not require a host to survive.
D. Virus
Viruses are obligate intracellular parasites and must infect a living host cell to reproduce and
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. The failure of the body to function normally
This is too general and applies to any illness, not specifically infection.
B. A diseased section of the body
This is vague and doesn’t identify causative factors like pathogens.
C. The invasion of the body by a pathogen and the subsequent symptoms in response to the invasion
This accurately defines infection as a host response to pathogen invasion.
D. The invasion of the body by a disease
Diseases don’t invade; pathogens do. This option is not scientifically accurate.
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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