Imagine that a patient is admitted to the hospital after falling from the second-story window of her apartment. Tests reveal no injuries other than some swelling in the brain. Why, then, would her breathing become irregular?
A) The blood returning to the lungs from the brain is too high in oxygen.
B) Her tissues require more oxygen for healing.
C) The damage to the brain is affecting the respiratory center in the medulla.
D) Her swollen brain is causing a decrease in blood pressure.
E) The respiratory center in the lungs is malfunctioning due to a lack of carbon dioxide.
C
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Cholesterol functions in the plasma membrane to
A. transport ions. B. serve as an energy molecule. C. maintain fluidity. D. mediate steroid action. E. maintain hypertension.
Below is a pedigree of a human genetic disease in which solid color indicates affected individuals. Assume that the disease is caused by a gene that can have the alleles A or a. If individuals 2 and 3 have a child together, what is the probability that the child will exhibit the disease?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%
________ is the evolutionary history of a species or group of related species
a. Cladistics b. Phenetics c. Phylogeny d. Cladogram
The mycolic acids of the cell wall are an important factor in the pathogenicity of the organisms that cause
a) influenza. b) diphtheria. c) pertussis. d) tuberculosis.