#Question id: 12455
#Unit 10. Ecological Principles
#Question id: 2203
#Unit 2. Cellular Organization
Parietal cells acidify the stomach contents while maintaining a neutral cytosolic pH by:
a. exporting “excess” cytosolic OH– as HCO3–.
b. exchanging HCO3– for Cl–.
c. preserving electroneutrality by accompanying the movement of each Cl– ion into the stomach lumen by a K+.
d. the excess K+ ions pumped inward by the H+/K+ ATPase are returned to the stomach lumen, thus maintaining the normal intracellular K+ concentration.
Which of the following combination is correct?
#Question id: 4027
#Unit 3. Fundamental Processes
Enhancers are considered transcription-control elements that regulate the expression of eukaryotic genes. Which one of the following is true regarding these elements?
#Question id: 23109
#Unit 2. Cellular Organization
#Question id: 28438
#Unit 5. Developmental Biology