Which of the following is an essential role played by large intestine bacteria?
A) absorb bilirubin
B) synthesize vitamins C and D
C) fermentation of indigestible carbohydrates
D) produce gas
C
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Absence of angiotensin converting enzyme will lead to
a) decreased blood pressure b) increased blood pressure c) will not have any effect on blood pressure d) All of these choices are correct. e) None of these choices is correct.
If neuronal pathways present at birth are not used during sensitive developmental periods, they may be eliminated
Indicate whether the statement is true or false
The footplate of the stapes is
A. much larger than the tympanic membrane, and the ossicles therefore amplify sound waves. B. much smaller than the tympanic membrane, and the ossicles therefore amplify sound waves. C. much smaller than the tympanic membrane, and the ossicles therefore dampen sound waves. D. much larger than the tympanic membrane, and the ossicles therefore dampen sound waves.
Which of the following statements is true regarding tonsils?
a. Tonsils provide protection against bacteria entering the oral and nasal cavities. b. Tonsils contain red pulp and white pulp. c. Tonsils increase in size in adults. d. Tonsils are located in both the oral and abdominal cavities. e. Tonsils are not functional in children.