Why are alveoli arranged in small grape-like clusters?
A) increase chest volume and elasticity (resilience)
B) maximize surface area
C) maximize density and volume
D) maximize surface area and minimize thickness
E) increase tidal volume
Ans: D) maximize surface area and minimize thickness
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
If a culture of Bacillus anthracis containing endospores was used in this experiment, do you think this culture would be more or less susceptible to the chemical disinfectants than Pseudomonas aeruginosa?
A) Bacillus anthracis would be more susceptible to chemical disinfection than Pseudomonas aeruginosa B) Bacillus anthracis would be less susceptible to chemical disinfection than Pseudomonas aeruginosa
Which gene therapy is currently approved in the United States?
A) stem cell gene therapy B) enhancement gene therapy C) somatic gene therapy D) germ-line gene therapy
People who are lactose intolerant can often consume some products made from milk such as cheese and yogurt because microorganisms in their digestive system consume the lactose. By comparison, people with a true milk allergy, which involves an immune response to milk protein, cannot consume milk or products made from milk. Given this information, what can you conclude about milk?
A. The protein that causes a true milk allergy is lactose. B. All people who are lactose intolerant are also allergic to milk. C. Yogurt contains live and active cultures of Lactobacillus acidophilus bacteria and therefore prevents an allergic response in people with a true milk allergy. D. Lactose is a carbohydrate, not a protein and is therefore not the cause of true milk allergies.