The diaphragm contracts during the phase of respiration called:

A. A small amount of carbon dioxide is transported dissolved in plasma, but this accounts for only about 5–10% of the total CO₂ in the blood.
B. Some carbon dioxide binds to hemoglobin to form carbaminohemoglobin, but this form carries only about 20–30% of CO₂.
C. Albumin primarily transports hormones, fatty acids, and other substances—not carbon dioxide.
D. The majority of carbon dioxide (about 60–70%) is carried in the blood as bicarbonate ions (HCO₃⁻). This occurs through a reaction where CO₂ combines with water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions.

A. Waiting 15 minutes after giving the cough syrup is unnecessary. There's typically no reason to delay giving tablets after a liquid medication unless specifically indicated.
B. Giving the cough syrup between the tablets is not an optimal approach, as it could result in potential interactions or interfere with absorption of the medications.
C. Administering the cough syrup first allows the liquid medication to be absorbed more quickly. Afterward, the tablets can be given with water to facilitate swallowing and ensure proper absorption. This order is generally most effective in promoting absorption and preventing interference between the two types of medication.
D. Administering the tablets first may lead to them being coated with the liquid, potentially delaying their absorption and effectiveness.