About 70% of the CO2 that diffuses into systemic capillaries
A. directly dissolves in the plasma.
B. combines with water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions.
C. binds to hemoglobin.
D. forms carbonic anhydrase, which combines carbonic acid and water to solubilize the CO2.
B
You might also like to view...
Label B represents which structure(s)?
A) circular folds
B) submucosa
C) muscularis externa
D) serosa
E) mucosa
Which of the following structures contains oocytes?
a. Testes b. Ovaries c. Uterus d. Vagina e. Primary follicles
Which of these phases of stomach secretion is correctly matched?
A) Cephalic phase: the largest volume of secretion is produced. B) Gastric phase: gastrin secretion is inhibited by distention of the stomach. C) Gastric phase: initiated by chewing, swallowing, or thinking of food. D) Gastrointestinal phase: stomach secretions are inhibited.
Which of the following is composed of multiple layers of cells?
A) simple squamous epithelium B) simple columnar epithelium C) transitional epithelium D) pseudostratified columnar epithelium