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Which of the following requires another living host for its continued existence?

Worm

Fungi

Arthropod

Virus

Answer and Explanation

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

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Correct Answer is A

Explanation

A. Shingles

Shingles (herpes zoster) occurs when the varicella-zoster virus reactivates from latency in nerve ganglia, typically many years after initial infection with chickenpox.

B. Measles

Measles is caused by the rubeola virus and is not related to herpes varicella zoster.

C. Smallpox

Smallpox is caused by the variola virus, which is entirely different from the herpesvirus group.

D. Mumps

Mumps is caused by a paramyxovirus and is unrelated to varicella-zoster.

A. Tonsils B. Thyroid gland C. Thymus gland D. Spleen

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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Which of the following requires another living host for its continued existence?

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Naxlex Comprehensive Predictor Exams

Herpes varicella zoster (chicken pox) may lay dormant in the nerves for years; when awakened in later life, it causes:

Correct Answer is A

Explanation

Which of the following are described as partially encapsulated lymph nodes located in the throat area?

Correct Answer is A

Explanation

B and T cells are:

Thymosin:

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Which of the following best describes an infection?

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