Principles of Anatomy and Physiology
16th Edition
ISBN: 9781119662792
Author: Tortora, Gerard J., DERRICKSON, Bryan H.
Publisher: WILEY
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Textbook Question
Chapter 22, Problem 1CP
What is a pathogen?
Expert Solution & Answer
Summary Introduction
To review:
The term pathogen.
Introduction:
A pathogen is an organism, such as bacteria, virus, or fungi, which is capable of producing a disease. The capacity of a pathogen to cause a disease is known as pathogenicity.
Explanation of Solution
Pathogens are mostly microscopic and are widespread organisms. They can be present in air, soil, and water, as well as on the body surface or inside the body of other organisms. They attack and live off their host organism. In vaccines, the pathogens are used to develop immunity and strengthen the immune response of an individual receiving it.
The pathogens can enter the body via cuts, infected food, wounds, water, or even while inhaling air. A pathogen can be a virus, bacterium, protozoan, fungi, or an insect. It can be virulent or nonvirulent on the basis of being able to penetrate the body and capability of causing the disease. Some examples of pathogenic diseases and syndromes are chicken pox, amoebic dysentery, candidiasis, and AIDS (acquired immune deficiency syndrome).
Conclusion
Thus, a pathogen is a biological causative agent that is capable of inducing an infection or a disease in another organism. Organism develops immunity against such foreign agents in order to maintain the homeostasis of the body.
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Chapter 22 Solutions
Principles of Anatomy and Physiology
Ch. 22 - What is a pathogen?Ch. 22 - Now are innate and adaptive immunity different?Ch. 22 - What are the components and functions of the...Ch. 22 - Prob. 4CPCh. 22 - Diagram the route of lymph circulation.Ch. 22 - What is the role of the thymus in immunity?Ch. 22 - Prob. 7CPCh. 22 - 8. What are the names of the four lymph sacs from...Ch. 22 - What physical and chemical factors provide...Ch. 22 - What internal defenses provide protection against...
Ch. 22 - How are the activities of natural killer cells and...Ch. 22 - 12. What are the main signs, symptoms, and stages...Ch. 22 - Prob. 13CPCh. 22 - 14. How do the major histocompatibility complex...Ch. 22 - Prob. 15CPCh. 22 - 16. How do antigen-presenting cells process...Ch. 22 - What are cytokines, where do they arise, and how...Ch. 22 - 18. What are the functions of helper, cytotoxic,...Ch. 22 - Prob. 19CPCh. 22 - Prob. 20CPCh. 22 - Prob. 21CPCh. 22 - How are cell-mediated and antibody-mediated immune...Ch. 22 - Prob. 23CPCh. 22 - Prob. 24CPCh. 22 - Prob. 25CPCh. 22 - Prob. 26CPCh. 22 - Prob. 27CPCh. 22 - Prob. 1CTQCh. 22 - Due to the presence of breast cancer, Mrs. Franco...Ch. 22 - Prob. 3CTQ
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