Villi
A. generate movement of materials in the large intestine.
B. contain both smooth and skeletal muscle fibers.
C. increase surface area in the small intestine.
D. are found throughout the gastrointestinal tract.
E. All of the choices are correct.
Answer: C
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Indicate whether the statement is true or false
One of the main ingredients in a common antacid is sodium bicarbonate. Which of the following best explains the antacid properties of this ingredient?
A. NaHCO3 (sodium bicarbonate) dissociates into Na+ + HCO3-. Then, HCO3- breaks down into H+, CO2, and C. B. NaHCO3 (sodium bicarbonate) dissociates into Na+ and H2CO3. Then, H2CO3 breaks down into H+ and HCO3-. C. The bicarbonate of sodium bicarbonate binds to hydrogen atoms in the environment of the stomach and raises the pH while neutralizing acid. D. The sodium of sodium bicarbonate binds to OH- in the environment of the stomach and raises the pH, neutralizing acid.
Sympathetic innervation of the hearta: increases the heart rateb: decreases the heart ratec: increases the force of contractionsd: decreases the force of contractionse: has no effect on contraction force
A. b, e B. a, d C. a, e D. b, d E. a, c
One example of a multiaxial joint is the ________ joint.
A. proximal radioulnar B. humeroulnar C. atlantoaxial D. humeroscapular E. metatarsophalangeal