Which of the following have the most efficient lungs: amphibians, mammals or birds? Explain your answer. What will be an ideal response?
ANSWER: Amphibians have the simplest lung – it is not convoluted and thus has a low surface area. In
addition, air is pushed into their lungs which limits flow. Mammals have far more convoluted
lungs to increase surface area and have the anatomy to draw air into the lung. However, there
is still a delay as air comes in and then goes out. Birds on the other hand have convoluted
lungs and a system to draw air continually over the absorptive surface of the lung.
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When the dentist gives you a shot of anesthetic before drilling into one of your teeth, she is numbing a facial nerve, which is a:
A. cranial nerve; part of the peripheral nervous system. B. cranial nerve; part of the central nervous system. C. spinal nerve; part of the peripheral nervous system. D. spinal nerve; part of the central nervous system. E. None of the above are correct.
The same researcher discovers that one patient has an abnormally high level of IgE immunoglobulin. He goes back to check the patient's chart. What are the likely symptoms of this patient? Select all correct choices
A. persistent infections of the mucous membranes B. persistent viral infections C. severe allergies D. severe asthma
What is the correct sequence of structures through which air passes through on the way into the mammalian lung?
A. larynx ? pharynx ? trachea ? bronchi ? bronchioles ? alveoli B. alveoli ? bronchioles ? bronchi ? trachea ? larynx ? pharynx C. pharynx ? larynx ? trachea ? bronchi ? bronchioles ? alveoli D. pharynx ? trachea ? larynx ? bronchi ? bronchioles ?alveoli E. bronchi ? bronchioles ? pharynx ? larynx ? trachea ? alveoli
If all the offspring of a cross had the genotype Aa Bb, the parents of the cross would most likely be
a. AA BB ? aa bb. b. AA bb ? aa BB. c. Aa Bb ? Aa Bb. d. Aa bb ? aa Bb. e. both AA BB ? aa bb and AA bb ? aa BB.