"Acidic" is an appropriate description for four of the following. Which one is the exception?
A. Excess hydrogen ions
B. The contents of the stomach
C. Magnesium hydroxide
D. HCl
E. A pH less than 7
Answer: C
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In humans, which of the following is not a response to a decrease in the partial pressure of oxygen?
1.Increased erythrocyte production 2.Increase in the number of alveoli 3.More extensive capillary networks in the lungs 4.Hemoglobin molecules with a greater affinity for O2
The process illustrated in Figure 5-2 would most likely be used to transport:a
glucose. b. hormones. c. potassium ions. d. carbon dioxide. e. bacteria.
Which class is composed mostly of freshwater parasites called leeches?
a. Hirudinea b. Oligochaeta c. Cestoda d. Polychaeta
Obligate anaerobes may be cultured in the laboratory
A) in a reducing medium. B) in a standard incubator. C) in standard Petri plates. D) on blood agar plates. E) in standard complex media.