Regarding the gastrointestinal (GI) tract, the function of gastrin is to

A 23-year-old man visits his physician with symptoms of abdominal discomfort and diarrhea. The man states that the diarrhea has been present off and on for approximately 6 weeks. He especially notes symptoms after a breakfast of wheat cereal and milk. His physician considers the possibility of two disorders, Celiac disease and lactose intolerance. What  is one laboratory test that would diagnose Celiac disease? What is one laboratory test that would diagnose lactose intolerance?

An example of an uncontrollable preanalytical variable would be

A voltmeter is connected in:a. Series  b. Parallel  c. Either  d. Doesn’t matter

Coulomb’s law constant \( k \) has units of:a. N·m  b. V/m  c. N·m²/C²  d. C²/N·m²

What is the SI unit of electric field?a. N  b. N/C  c. V  d. C/N

Electric potential is defined as:a. Potential energy per unit charge  b. Charge per unit voltage  c. Current per unit resistance  d. Energy per unit current

Kirchhoff’s loop rule is based on:a. Conservation of energy  b. Conservation of charge  c. Ohm’s Law  d. Conservation of momentum

What is the direction of the electric field produced by a positive point charge?a. Away from the charge  b. Toward the charge  c. Perpendicular to the charge  d. In circles around the charge

Capacitors in series combine as:a. C = C₁ + C₂ + …  b. C = C₁C₂  c. 1/C = 1/C₁ + 1/C₂  d. C = 1/C₁ + C₂