Which of the following represents the complete chemical reaction for the bicarbonate buffer system?
A. CO2 + H2O 
HCO3- + H+
B. CO2 + H2O 
H2CO3 
HCO3- + H+
C. H2CO3 
HCO3- + H+
D. CO2 + H2O 
HCO3- + H+ 
H2CO3
E. H2CO3 
CO2 + H2O 
HCO3- + H+
Answer: B
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During the resting potential, many potassium channels are open in the plasma membrane
Indicate whether the statement is true or false
Why is cholesterol a critical component of the plasma membrane?
A) Cholesterol serves a role in cell recognition. B) Cholesterol catalyzes metabolic reactions from its position within the plasma membrane. C) Cholesterol transports certain molecules into the cell. D) Cholesterol stabilizes the structure of the plasma membrane when the temperature changes.
The gel-like substance housed in the posterior segment of the eye is the ________
A) aqueous humor B) lens C) vitreous humor (body) D) cornea