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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Which of the following is a barrier against pathogens provided by the skin? a. high pH b. mucus c. tears d. desiccation
Which of the following skin cells alert the immune system to pathogens?a. fibroblastsb. melanocytesc. keratinocytesd. dendritic cellse. tactile cells
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
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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- The Inflammatory Response Is a General a. What causes the area around a cut or a scrape to become warm? b. What is the role of this heat in the inflammatory response?arrow_forwardThe first cells which respond to penetration of the skin by a penetrating thorn are: immune cells keratinocytes neuronsarrow_forwardPigmentation of skin is due to: A. lymphocytes B. monocytes C. leucocytes D. melanocytesarrow_forward
- The dead outer surface of skin (not mucous membranes) uses which of the following innate defenses to inhibit microbial growth? Choose all that apply. Group of answer choices Prion production Interferon production Low pH Drynessarrow_forwardThis is a picture of Thick Skin - dermis. Please use arrows to identify the following: papillary layer reticular layer collage fibersarrow_forwardDescribe four characteristics of skin that help it resist infection.arrow_forward
- which of the following is a chemical defense found on all epithelial surfaces of the body? Lysozme antibodies tearsarrow_forwardWhat 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.arrow_forwardWhat happens when a dendritic cell detects a pathogen? Group of answer choices the dendritic cell will cause agglutination of the pathogen cells the dendritic cell secretes antibodies the dendritic cell will produce immunoglobin the dendritic cell consumes the pathogen by phagocytosisarrow_forward
- Which of the following chemicals is released by the body in response to exposure to allergens such as mold, pollen, and food? Leukotriene Mast cellarrow_forwardWhich of the following cells is not phagocytic? Monocyte Dendritic cells Macrophage Chondrocytearrow_forwardWhich of the following inflammatory signs specifies pain?a. tumor b. calor c. dolor d. ruborarrow_forward
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