Biology
Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 53, Problem 1TY

Which of the following is not an example of a barrier defense in animals?

  1. a. skin
  2. b. secretions from skin glands
  3. c. exoskeleton
  4. d. mucus
  5. e. antibodies
Expert Solution & Answer
Check Mark
Summary Introduction

Introduction: The body contains a well-defined system to protect itself from infections and harmful agents. This system is known as the immunity system. The two types of immunity systems are innate and adaptive immunity. The immunity that an organism contains from the time of birth is called innate immunity. However, the immunity that the organism acquires during its lifetime is called adaptive immunity.

Answer to Problem 1TY

Correct answer: Antibodies is not an example of a barrier defense in animals. Hence, the correct answer is option e.

Explanation of Solution

Reason for correct answer:

Barrier defense is a defense mechanism of the body in which it creates a barrier around the cells. It is the most common defense mechanism used by majority of organisms. The skin is the best example of a barrier defense. These defenses are not generated as a response to the invading pathogens. They are present naturally in the body. They are part of the innate immunity system. However, antibodies are involved in the adaptive immune system. They are generated as a response to the antigens of the invading pathogens. The antibodies are not a barrier defense in animals as they do not create any barrier to protect the body from pathogens.

Option e. is given as “antibodies”.

The example which is not a barrier defense in animals is antibodies. Hence, the correct answer is option e.

Reasons for incorrect answer:

Option a. is given as, “skin”.

Skin is the best example of a barrier defense. It acts as a barrier to protect the body from the entering pathogens. It is the largest defense barrier of the body. Hence, option a. is incorrect.

Option b. is given as, “secretions from skin glands”.

The skin is an example of barrier defense. The secretions from skin glands also act as a defense barrier. They help the skin to prevent the pathogens from entering the body. They form a barrier around invading microbes and kill them. Hence, option b. is incorrect.

Option c. is given as, “exoskeleton”.

Some animals contain an external skeleton system such as insects. This type of skeleton system helps in protecting the body from pathogens. The exoskeleton is a defense barrier present in some animals. Hence, option c. is incorrect.

Option d. is given as, “mucus”.

The mucous membrane secretes a fluid known as mucus. Mucus is sticky and has antimicrobial compounds. It protects the mucous membrane from the invading microbes as the microbes stick to mucus and die. Mucus is an example of a defense barrier as it creates a sticky barrier around the pathogens.  Hence, option d. is incorrect.

Hence, the options a., b., c., and d. are incorrect.

Conclusion

Therefore, the example which is not a defense barrier is antibodies. It does not create any barrier to protect the body from pathogens.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
would this be considered a novel protein and if not how can I fix it so it is and can you draw the corrections please
In as much detail as possible, hand draw a schematic diagram of the hypothalamic-pituitary- gonad (HPG) axis in the human male. Be sure to include all the relevant structures and hormones. You must define all abbreviations the first time you use them. Please include (and explain) the feedback loops.
A negligence action was brought by a mother against a hospital on behalf of her minor daughter. It alleged that when the mother was 13 years of age, the hospital negligently transfused her with Rh-positive blood. The mother's Rh-negative blood was incompatible with and sensitized by the Rh-positive blood. The mother discovered her condition 8 years later during a routine blood screening ordered by her healthcare provider in the course of prenatal care. The resulting sensitization of the mother's blood allegedly caused damage to the fetus, resulting in physical defects and premature birth. Did a patient relationship with the transfusing hospital exist?
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Text book image
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Text book image
Ebk:Nutrition & Diet Therapy
Health & Nutrition
ISBN:9780357391747
Author:DEBRUYNE
Publisher:Cengage
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Text book image
Medical Terminology for Health Professions, Spira...
Health & Nutrition
ISBN:9781305634350
Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. Schroeder
Publisher:Cengage Learning
Text book image
Body Structures & Functions Updated
Biology
ISBN:9780357191606
Author:Scott
Publisher:Cengage
7 Freudian Defence Mechanisms Explained; Author: Lewis Psychology;https://www.youtube.com/watch?v=fTnjJ105ze4;License: Standard youtube license