Human Biology: Concepts and Current Issues
7th Edition
ISBN: 9780321821652
Author: Michael D. Johnson
Publisher: Benjamin Cummings
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Chapter 9, Problem 9TY
Summary Introduction
Introduction:
In the war against pathogens, the body has many cells in its arsenal, each of which performs a different role. The immune system either produces antibodies to mark the pathogen for destruction or deploys armies of cytotoxic T cells (TC), which can directly phagocytose the antigen. As each antigen is different, the mechanism employed for their elimination is varied too.
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Students have asked these similar questions
Which of the following sudden changes might be a result of an infection?
a. increase in the activity of white blood cells
b. decrease in the activity of antigens produced by the mitochondria
c. decrease in the amount of DNA present in the nuclei of cells
d. increase in the number of red blood cells
Which of the following leads to swelling seen in an inflammation?
a. Vasodilation
b. Complement activation
c. Phagocytosis by macrophages
d. Increased capillary permeability
Phagocytes move through capillary walls by squeezing between adjacent endothelial cells, a process known as (a) diapedesis. (b) chemotaxis. (c) adhesion. (d) perforation.
Chapter 9 Solutions
Human Biology: Concepts and Current Issues
Ch. 9 - Prob. 1QCCh. 9 - Prob. 2QCCh. 9 - Define the term pathogen and give some examples.Ch. 9 - Prob. 2CRCh. 9 - Prob. 3CRCh. 9 - Prob. 4CRCh. 9 - Prob. 5CRCh. 9 - Describe in general terms the distinction between...Ch. 9 - Describe the concept of an antigen and how it...Ch. 9 - Prob. 8CR
Ch. 9 - Prob. 9CRCh. 9 - Prob. 10CRCh. 9 - Prob. 1TYCh. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Prob. 5TYCh. 9 -
6. Which of the following is a benefit of...Ch. 9 - Prob. 7TYCh. 9 -
8. The following are steps in phagocytosis: (1)...Ch. 9 - Prob. 9TYCh. 9 - Prob. 10TYCh. 9 - Prob. 11TYCh. 9 - Prob. 12TYCh. 9 - Which of the following increases the likelihood of...Ch. 9 - Which of the following does not belong with the...Ch. 9 - Which of the following statements about HIV is...Ch. 9 - Prob. 1AWKCh. 9 - Prob. 2AWKCh. 9 -
3. Everyone knows that bacteria can cause...Ch. 9 - Prob. 4AWKCh. 9 - Prob. 5AWKCh. 9 - Why is it that most people get the chicken pox...Ch. 9 - The immune system is supposed to defend us from...
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- Match the immune cell with its main function. ___dendritic cell a. professional phagocyte ___B cell b. antigen-presenter ___helper T cell c. activates other lymphocytes ___NK cell d. makes antibodies ___macrophage e. kills ailing body cells that lack MHC markersarrow_forwardWhich type of cell actually secretes antibodies?a. T cell b. macrophage c. plasma cell d. monocytearrow_forwardWhich of the following is not a characteristic of inflammation? a. inactivation of macrophages b. increased vascular permeability and edema c. vasodilation d. pain e. influx of leukocytes.arrow_forward
- Which of these cell types aids the activation of T lymphocytes by antigens? a. Macrophages b. Neutrophils c. Mast cells d. Natural killer cellsarrow_forwardWhich cell recognizes stressed cells in the absence of expressed MHC or antibodies? A. B lymphocyte B. dendritic cell C. natural killer (NK) cell D. macrophagearrow_forwardfever helps the body fight infection in which of the follwoing ways? a. fever causes the creation of lysosomes b. increased body temperature decreases phagocytosis c. fever inhibits the growth of some microorganisms d. fever increases capillary permeabilityarrow_forward
- ____________interferon, produced by T lymphocytes, activates cellscalled _____________ and is involved in destroying viruses.a. Gamma, fibroblasts b. Beta, lymphocytes c. Alpha, natural killer cells d. Beta, fibroblastsarrow_forwardWhich cell actively produces antibodies during an immune response? B lymphocyte T lymphocyte plasma cellarrow_forwardWhich of the following chemicals is released by the body in response to exposure to allergens such as mold, pollen, and food? a. Histamine 1 b. Histamine 2 c. Leukotriene d. Mast cellarrow_forward
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