What is a pathogen?
A disease-producing microorganism
The direction, or course, in which the disease progresses
A carcinogenic bacteria
The generic name for various diseases
The Correct Answer is A
A. A disease-producing microorganism:
A pathogen is defined as a microorganism (such as bacteria, virus, fungus, or parasite) that causes disease.
B. The direction, or course, in which the disease progresses:
This describes the pathogenesis of a disease, not a pathogen.
C. A carcinogenic bacteria:
Not all pathogens are carcinogenic. Some may be, but the term "pathogen" simply refers to any disease-causing agent.
D. The generic name for various diseases:
A pathogen is not a name for diseases themselves but for the microorganisms that cause them.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Chemical barriers: tears, saliva, stomach acid
These are first-line defenses that kill or inhibit pathogens before entry.
B. Signs of inflammation: redness, heat, swelling, pain
These are the classic cardinal signs of inflammation.
C. Mechanical barriers: skin, mucous membrane
These form physical barriers to pathogen entry.
D. Nonspecific immunity: inflammation, natural killer cells, fever, T cells
T cells are part of specific (adaptive) immunity, not nonspecific immunity.
Correct Answer is D
Explanation
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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