Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 3CT
The man pictured in Figure 4.17 wears skin ornaments applied by piercing. Among other functions, the skin is a barrier to potentially dangerous bacteria, and some people object to extensive body piercing on the grounds that it opens the door to infections. Explain why you do or don’t agree with this objection.
Figure 4.17 This young man has chosen to undergo multiple body piercings.
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The man pictured below wears several dozen ornaments in his skin, most of them applied by piercing. Among the skin’s many functions, it serves as a barrier to potentially dangerous bacteria, and some people object to extensive body piercing on the grounds that it opens the door to infections. Explain why you do or don’t agree with this objection.
Normal flora may cause opportunistic infections when:(a) They are continually nourished by the body.(b) The microorganism gains access to an unusual body site.(c) They are continually present.(d) They colonize any body surface.
Which of the following is not an example of the physical, mechanical, and chemical barriers at body surfaces that prevent most microbes from entering the internal environment?
The flushing action of urination
Sticky mucus secreted by the epithelial tissues of the body's interior
Phagocytosis by white blood cells
The thick waterproof layer of dead cells that make up the skin
Chapter 4 Solutions
Human Biology (MindTap Course List)
Ch. 4 - List the general characteristics of epithelium,...Ch. 4 - List the major types of connective tissues; add...Ch. 4 - Identify and describe the tissues shown below.Ch. 4 - Prob. 4RQCh. 4 - List the basic types of membranes in the body.Ch. 4 - Define the terms tissue, organ, and organ system....Ch. 4 - What are some functions of skin?Ch. 4 - Define homeostasis.Ch. 4 - What is extracellular fluid, and how does the...Ch. 4 - ________ tissues have closely linked cells and one...
Ch. 4 - Most has collagen and elastin fibers. a. muscle...Ch. 4 - __________, a specialized connective tissue, is...Ch. 4 - ______tissue detects and integrates information...Ch. 4 - _______can shorten (contract). a. Muscle tissue b....Ch. 4 - After you eat too many carbohydrates and proteins,...Ch. 4 - The bodys internal environment consists of______....Ch. 4 - In______, physical and chemical aspects of the...Ch. 4 - _______detect specific environmental changes,...Ch. 4 - Prob. 10SQCh. 4 - In people who have the genetic disorder anhidrotic...Ch. 4 - Prob. 2CTCh. 4 - The man pictured in Figure 4.17 wears skin...Ch. 4 - Prob. 4CTCh. 4 - Prob. 5CT
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- Some strains of Staphylococcus aureus produce exfoliative toxin, a chemical that causes portions of the entire outer layer of the skin to be sloughed off in a disease called scalded skin syndrome.Given that cells of the outer layer are going to fall off anyway, why is thisdisease dangerous?arrow_forwardMarie Curie was a famous Polish-born French scientist known for her pioneering research on radioactivity. Her work not only brought her fame but her death as well; she developed aplastic anemia due to radiation exposure. She experienced recurrent and prolonged infections (viral, bacterial, parasitic, and fungal). Explain why she suffered from recurrent infections? Thank you!arrow_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
- A man infected with the bacterium, Escherichia coli, was treated with the correct antibiotic. E.coli was no longer found in the man’s blood, but his symptoms of fever and inflammation worsened. Why? What caused the man’s response to the treatment?arrow_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_forwardNew 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_forward
- Clot and scab formation occur as part of this process: Group of answer choices cytolysis hematopoiesis phagocytosis inflammationarrow_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_forwardCompare stained cells to that of cancerous human colon cells in the pictures shownarrow_forward
- The immune system protects our body from invasion by nonself cells. Explain what could happen if you broke your tibia, exposing bone marrow cells that the immune system does not recognize as self cells?arrow_forwardThe first cells which respond to penetration of the skin by a penetrating thorn are: immune cells keratinocytes neuronsarrow_forwardBryan is a physician at a major metropolitan hospital. Since the attacks of September 11, 2001, his hospital has been preparing for a terrorist attack. Why does the CDC recommend using antibiotics only when exposure to disease is suspected or confirmed?arrow_forward
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