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 C
Explanation
A. Specific immunity: B cells, T cells:
B cells and T cells are part of the adaptive (specific) immune system.
B. Mechanical barriers: skin, mucous membrane:
These are physical defenses against infection.
C. Chemical barriers: tears, saliva, stomach acid, B cells, T cells:
Tears, saliva, and stomach acid are chemical barriers. B cells and T cells are not chemical barriers; they are components of specific immunity.
D. First line of defense: skin, mucous membrane, tears, sneezing:
These are all part of the body's innate first-line defenses.
Correct Answer is B
Explanation
A. Cardiovascular
The cardiovascular system transports blood and immune cells but is not a barrier against pathogens.
B. Integumentary
The skin and mucous membranes form the first physical barrier, preventing pathogen entry.
C. Urinary
The urinary system flushes out pathogens but is not the primary barrier to entry.
D. Endocrine
The endocrine system regulates hormones, not involved in first-line defense.
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