Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 42, Problem 4RQ
Which of the following is a barrier against pathogens provided by the skin?
- high pH
- mucus
- tears
- desiccation
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Students have asked these similar questions
Which of the following cell functions in the immune response in the skin?
Merkel cell
keratinocyte
Langerhans cell
melanocyte
Which is NOT a role of sebum in the innate immune system.
Group of answer choices
dehydrates microbes
keeps skin pliable and less likely to tear
contains antimicrobial proteins
lowers pH
What feature of the skin creates a physical barrier to microbial invasion?
Group of answer choices
The outer layers are composed of cells full of protein which forms NETs to trap microbes until they are shed.
The surface is constantly patrolled by phagocytic cells.
The outer layers are dead cells, tightly linked together, and are frequently shed.
All of these mechanisms can provide defense against microbial invaders.
The oil secreted onto the surface of the skin traps microbes, preventing penetration.
The fine hairs move microbes to mucous membranes for phagocytosis.
Chapter 42 Solutions
Biology 2e
Ch. 42 - Figure 42.11 Which of the following statements...Ch. 42 - Figure 42.14 Based on what you know about MHC...Ch. 42 - Figure 42.16 The Rh antigen is found on Rh...Ch. 42 - Which of the following is a barrier against...Ch. 42 - Although interferons have several effects, they...Ch. 42 - Which organelle do phagocytes use to digest...Ch. 42 - Which innate immune system component uses MHC I...Ch. 42 - Which of the following is both a phagocyte and an...Ch. 42 - Which immune cells bind MHC molecules on APCs via...Ch. 42 - What “self” pattern is identified by NK cells?...
Ch. 42 - The acquired ability to prevent an unnecessary or...Ch. 42 - A memory B cell can differentiate upon reexposure...Ch. 42 - Foreign particles circulating in the blood are...Ch. 42 - The structure of an antibody is similar to the...Ch. 42 - The first antibody class to appear in the serum in...Ch. 42 - What is the most abundant antibody class detected...Ch. 42 - Breastfed infants typically are resistant to...Ch. 42 - Allergy to pollen is classified as: an autoimmune...Ch. 42 - A potential cause of acquired autoimmunity is...Ch. 42 - Autoantibodies are probably involved in: reactions...Ch. 42 - Which of the following diseases is not due to...Ch. 42 - Different MHC I molecules between donor and...Ch. 42 - If a series of genetic mutations prevented some,...Ch. 42 - Explain the difference between an epitope and an...Ch. 42 - What is a naïve B or T cell?Ch. 42 - How does the Th1 response differ from the Th2...Ch. 42 - In mammalian adaptive immune systems, T cell...Ch. 42 - How do B and T cells differ with respect to...Ch. 42 - Why is the immune response after reinfection much...Ch. 42 - What are the benefits and costs of antibody cross...
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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
- List three different protective mechanisms in the skin that resist infection. Explain how they work!arrow_forwardThe first cells which respond to penetration of the skin by a penetrating thorn are: immune cells keratinocytes neuronsarrow_forwardThis is a picture of Thick Skin - dermis. Please use arrows to identify the following: papillary layer reticular layer collage fibersarrow_forward
- Soap, as in baby wipes, can encourage the movement of antigens through the epidermis to dermal immune cells, increasing the risk of development of allergies to those antigens True The whole statement is true. False Some of the statement is false.arrow_forwardMatch the following structures with the skin layer in which they are located Pacinian corpuscles Melanocytes Merkel cells Langerhans cells Meissner's corpuscles A Epidermis B Dermis C Subcutaneousarrow_forwardDescribe four characteristics of skin that help it resist infection.arrow_forward
- Explain the following Sweat glands in the armpits secrete perspiration with a pH close to neutral (7.0). How does this fact help explain body odor in this area as compared to other parts of the skin? Human immunodeficiency virus (HIV) preferentially destroys CD4+ cells. Specifically, what effect does this have on antibody and cell-mediated immunity? How does a phagocyte “know” it is in contact with a pathogen instead of another body cell?arrow_forwardWhich of the following statements is NOT true? O O None of the other four answers (All statements are true) When connective tissue (e.g., in the dermis) is damaged, repair leads to scar tissue formation During inflammation, all of the phagocytic leukocytes remain inside capillaries to prevent pathogens from entering the bloodstream The typical signs and symptoms of inflammation are redness, pain, heat, and swelling An abscess is an infection and collection of pus in a walled-off areaarrow_forwardDescribe how the skin protects against infection.arrow_forward
- Explain how the skin defends the body against pathogenic microorganismsarrow_forwardMr Bennett has a non healing chronic wound on his lower extremity today you note that wound exudate is bright green which organism is likely responsible for the appearance of the wound .arrow_forwardSkih Layers DERMIS phases EPIDERMIS CHARACTERISTIC Tissue type babh Presence of blood vessels This i Relative thickness Permeability (to water) Relative strength Short Answer (write a few complete sentences)arrow_forward
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