Which solution would have the lowest concentration of hydrogen ions?
A) Solution with a pH of 5
B) Solution with a pH of 8
C) Solution with a pH of 3
D) Solution with a pH of 10
Answer: D
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Substance X is a mostly polar molecule and Substance Y is a mostly non-polar molecule of a similar size. Which will diffuse from the extracellular fluid to the intracellular fluid faster if they are in equal concentrations outside and inside the cell?
A. Substance X will diffuse faster. B. Substance X and Substance Y will diffuse at the same rate, as they are of equal size and concentration. C. Substance Y will diffuse faster.
Which salivary gland produces a serous secretion containing large amounts of salivary amylase?
A) mandibular B) sublingual C) lingual D) submandibular E) parotid
The digestive function of the liver is to ________
A) neutralize toxic chemicals B) produce bile C) remove pathogens from the blood D) aid in the control of blood glucose levels
The most important factor in decreasing the intracellular concentration of calcium ion after contraction is
A) active transport of calcium across the sarcolemma. B) active transport of calcium back into the sarcoplasmic reticulum. C) active transport of calcium into the synaptic cleft. D) diffusion of calcium out of the cell. E) diffusion of calcium into the sarcoplasmic reticulum.