BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 50, Problem 1A
You start a new job in a research lab. The lab protocols state that you should check your hands for any breaks in the skin before handling infectious agents. This is because the epidermis fights microbial infections by
a. making the surface of the skin acidic.
b. excreting lysozyme to attack bacteria.
c. producing mucus to trap microorganisms.
d. All of the choices are correct.
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You start a new job in a research lab. The lab protocols state that you should check your hands for any breaks in the skin before handling infectious agents. This is because the body’s outer layer fights microbial infections bya. making the surface of the skin acidic.b. excreting lysozyme to attack bacteria.c. producing mucus to trap microorganisms.d. All of above.
Toll-like receptors (TLRS) act to
A. cause phagocytic chemotaxis.
B. induce phagocytosis.
C. bind microbial proteins and polysaccharides.
D. destroy microbial cells.
You may select zero, one, or many answers.
Fever can indicate that
a. the pathogen remains on the skin
b. the body is responding to an infection.
c. a pathogen has been trapped by mucous.
d. the body has recovered from an infection.
Chapter 50 Solutions
BIOLOGY
Ch. 50.1 - Prob. 1LOCh. 50.1 - Prob. 2LOCh. 50.1 - Prob. 3LOCh. 50.2 - Prob. 1LOCh. 50.2 - Prob. 2LOCh. 50.2 - Prob. 3LOCh. 50.3 - Prob. 1LOCh. 50.3 - Prob. 2LOCh. 50.4 - Explain how antibody diversity is generated.Ch. 50.4 - Prob. 2LO
Ch. 50.4 - Prob. 3LOCh. 50.5 - Define autoimmune diseases.Ch. 50.5 - Prob. 2LOCh. 50.6 - Explain antigenantibody reactions in the ABO blood...Ch. 50.6 - Prob. 2LOCh. 50.6 - Prob. 3LOCh. 50.7 - Prob. 1LOCh. 50.7 - Prob. 2LOCh. 50 - How would a high level of HCG present in a urine...Ch. 50 - What would happen if an NK cell killed a virally...Ch. 50 - Prob. 2IQCh. 50 - Prob. 3IQCh. 50 - Prob. 4IQCh. 50 - Cells that target and kill body cells infected by...Ch. 50 - Structures on invading cells recognized by the...Ch. 50 - Which one of the following acts as the alarm...Ch. 50 - Prob. 4UCh. 50 - Receptors that trigger innate immune responses a....Ch. 50 - Diseases in which the persons immune system no...Ch. 50 - Suppose that a new disease is discovered that...Ch. 50 - You start a new job in a research lab. The lab...Ch. 50 - In comparing T-cell receptors and immunoglobulins...Ch. 50 - If you have type AB blood, which of the following...Ch. 50 - Suppose that you get a paper cut while studying....Ch. 50 - If you wanted to cure allergies by bioengineering...Ch. 50 - Why do we need to be repeatedly vaccinated for...Ch. 50 - Prob. 7ACh. 50 - Suppose you take a job in the marketing department...Ch. 50 - Prob. 2SCh. 50 - Prob. 3SCh. 50 - Toll-like receptors have been found in a wide...
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- A child falls and receives a deep cut on her leg that went through her skin and is bleeding. Which of the following defense mechanisms will participate in eliminating contaminating microbes? A. ciliary escalator B. normal skin flora C. phagocytosis in the inflammatory response D. Iysozymearrow_forwardDrugs are often given to patients before going into surgery, to dentalpatients with heart disease, or to healthy family members exposed tocontagious infections.a. What word would you use to describe this use of drugs?b. What is the purpose of this form of treatment?c. Explain some potential undesired effects of this form of therapy.d. Define probiotics and list some ways they are used.arrow_forwardare cytolytic proteins that binds to target cell's plasma membrane to form pores. a. Chemokines b. Perforins c. Cytotoxicity d. Interferonsarrow_forward
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- Which of the following statements is incorrect? a. Mucosal surfaces are better than skin surfaces at supporting colonization by commensal microorganisms. b. The skin provides a larger surface area than mucosal surfaces for commensal microorganisms. c. There are ten times as many bacteria residing in the intestinal tract than the number of cells in the human body. d. It is common for commensal bacteria to live in symbiosis with their human hosts. e. During gestation in mammals, a fetus does not have any commensal microorganisms on their skin or mucosal surfaces.arrow_forwardDrugs are often given to surgical patients, to dental patients with heart disease, or to healthy family members exposed to contagious infections. a. What word would you use to describe this use of drugs? b. What is the purpose of this form of treatment? c. Explain some potential undesired effects of this form of therapy. d. Defi ne probiotics and give some ways they are used.arrow_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
- The most important factor in preventing infection in an open wound is Select one or more: а. a sterile dressing b. covering the wound C. irrigation with water d. using soap and water to clean the woundarrow_forwardA friend was recently diagnosed with strep throat. One week after his treatment, he redeveloped the infection. In conversation, your friend tells you, “I must have become immune to the drug the doctor gave me!” a. Discuss the validity of your friend’s statement, providing evidence in support of or refuting his claim. b. After further conversation, your friend tells you that he stopped taking his initial antibiotics after 2 days because he “felt 100% better.” Explain how this action might have played a role in the redevelopment of his infection. c. When he returned to his physician, she ordered a test to determine which antibiotic should be prescribed to treat his reinfection. Summarize a test that could be used to obtain this information.arrow_forwardWhich of the following drug clasification is responsible to liquify/break down mucus in order to aid the risk of coughing up thick, tenacious secretions a. Decongestant b. ACE Inhibitor c. Expectorant d. Mucolyticsarrow_forward
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