Among air breathing animals, birds have the most effective mechanism of extracting oxygen from air because ____
a. birds utilize crosscurrent exchange
b. bird lungs have more surface area
c. bird lungs are the largest among vertebrates
d. the air sacs provide additional respiratory surfaces
e. birds utilize positive force exchange
ANSWER: a
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Match the following items to the correct phrase.
_______1. Spherical bacteria arranged in pairs are called _______2. Rod-shaped bacteria arranged in chains are called _______3. Spherical bacteria arranged in clusters are called _______4. Rod-shaped bacteria arranged in pairs are called _______5. Spherical bacteria arranged in chains are called a. diplococci b. diplobacilli c. staphylococci d. streptobacilli e. streptococci
A selectively ________ membrane is one that allows some molecules to pass through but not others.
Fill in the blank(s) with the appropriate word(s).
Pili are bacterial structures used primarily for motility.
a. true b. false
A 21-year-old woman presents with a severe headache, body aches, and a fever of 102.8°F. She tells you that she returned from a humanitarian aid mission overseas a week and a half ago and began feeling ill yesterday morning. Given this patient's travel history and clinical presentation, you should expect her to develop:
A) spontaneous hemorrhaging. B) cutaneous lesions on her arms. C) bradycardia and hypersalivation. D) a rash and blisters on her face.