Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 43, Problem 1TYK
Summary Introduction
Introduction: The immune system is essential to every living things since it protects from diseases caused by foreign bodies. The immune system is categorized into two types, innate and adaptive immune systems. Innate immunity is the first line of defense, non-specific to antigens. Adaptive immunity is acquired in the lifetime and it is specific to antigens.
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The first cell to initiate an adaptive immune response to a novel pathogen is _____.
A. an antigen presenting cell such as a neutrophil or macrophage
B. a helper T cell in the lymph nodes
C. a B cell that binds a pathogen at the site of infection
D. a memory cell that is activated directly by the pathogen
An experiment tested the hypothesis that exposure to pesticides decreases immune function in tadpoles. The researchers raised tadpoles in groups, in containers of the same size in a room with consistent temperature and lighting. They exposed some tadpoles to no pesticides, some to low pesticide levels, and some to high pesticide levels, and then measured the density of white blood cells (immune cells) in the tadpoles.
Part a:
The researchers used a(n) ______________ experiment to show the effects of pesticides on tadpoles.
Group of answer choices
A. natural history
B. laboratory
C. field
D. quantitative model
E. observational
part b:
What is the dependent variable in this experiment?
Group of answer choices
A. consistent temperature
B. density of white blood cells
C. level of pesticides
D. intensity of lighting
E. number of tadpoles
part c:
The negative control treatment in the experiment was the:
Group of answer choices
A. tadpole group receiving no…
Why would adults be more likely to have an allergy to an insect venom than a child?
Give one hypothesis based on what you know about allergy development.
Chapter 43 Solutions
Study Guide for Campbell Biology
Ch. 43 - Briefly describe the insect defense system against...Ch. 43 - Prob. 2IQCh. 43 - Prob. 3IQCh. 43 - Prob. 4IQCh. 43 - Prob. 5IQCh. 43 - Prob. 6IQCh. 43 - Prob. 7IQCh. 43 - Prob. 8IQCh. 43 - Prob. 9IQCh. 43 - Prob. 1SYK
Ch. 43 - Prob. 2SYKCh. 43 - Although innate and adaptive immunity were...Ch. 43 - Prob. 1TYKCh. 43 - Prob. 2TYKCh. 43 - Prob. 3TYKCh. 43 - The process of clonal selection accounts for a....Ch. 43 - Prob. 5TYKCh. 43 - Which of the following destroys a target cell by...Ch. 43 - Prob. 7TYKCh. 43 - Prob. 8TYKCh. 43 - Prob. 9TYKCh. 43 - Prob. 10TYKCh. 43 - Prob. 11TYKCh. 43 - Prob. 12TYKCh. 43 - Prob. 13TYKCh. 43 - Prob. 14TYKCh. 43 - Prob. 15TYKCh. 43 - Prob. 16TYKCh. 43 - Prob. 17TYKCh. 43 - What is the key advantage to the use of monoclonal...Ch. 43 - Prob. 19TYKCh. 43 - Prob. 20TYKCh. 43 - Prob. 21TYKCh. 43 - From which of the following conditions would an...
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- New research suggests a link between some microbes that normally live in the body and seemingly unrelated major illnesses. The gum disease called periodontitis itself is not life-threatening, for instance, but it is a fairly good predictor for heart attacks. Bacteria that cause gum disease can trigger inflammation. Thinking back to your reading in Chapter 7, how do you suppose that this response also may be harmful to the heart?arrow_forwardWhich 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 cellsarrow_forwardOur first line of defense are barrier __________ that block pathogen entry. Once a pathogen makes its way across these barriers, ___________ blood cells such as Mast Cells recognize these pathogens and release __________ and other molecules that lead to recruitment of other immune cells and ____________ . Here are the choices for the question. a) tissues b) cytokines c) white d) inflammationarrow_forward
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- Choose the combination of answers that most accurately completes the statement. ................ is an example of an infl ammatory mediator that stimulates chemotaxis. a. Endotoxin c. A fi brin clot b. Serotonin d. Interleukin-2arrow_forwardThe increasing rates of asthma & other allergic conditions MIGHT be due to the "___________", meaning that lack of exposure to antigens in childhood might predispose someone to a _________ cytokine profile, leading to immune dysfunction & allergies. A) hygiene hypothesis; Th1 B) hygiene hypothesis; Th2 C) pigpen hypothesis: Th1 D) pigoen hypothesis; Th2arrow_forward
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