(A) The lungs are responsible for regulation of CO2, and this parameter primarily reflects respiratory function. (B) CO2 content of the blood is an indirect measure of respiratory function. (C) HCO3 is a measure of kidney function only and is important in acid-base balance. (D) Base excess represents the excess of HCO3 and is not reflective of respiratory function.

(A) This clinical situation is indicative of iron-deficiency anemia because the client has inadequate nutritional intake. Her blood volume is increasing faster than her red blood cell volume. Anemia is present in the second trimester when the hemoglobin level is <10.5 and the hematocrit value falls below 35%. She needs increased iron supplements with follow-up. (B) The client's values are below levels for physiological anemia. (C) The client is fatigued because of a low hemoglobin level. (D) Her hemoglobin level is low and will probably decrease even more when the blood volume peaks at 28 weeks.

Section: Questions Set F
Explanation:
(A) The chloride level is within acceptable limits. (B) The sodium level is within acceptable limits. (C) This value indicates hypokalemia, rather than the hyperkalemia that occurs during diabetic ketoacidosis. (D) When diabetic ketoacidosis exists, intracellular dehydration occurs and potassium leaves the cells and enters the vascular system, thus increasing the serum level beyond an acceptable range. When insulin and fluids are administered, cell walls are repaired and potassium is transported back into the cells. Normal serum potassium levels range from 3.5-5.0 mEq/L.

Explanation
(A) Anorexia and weight loss are problems that need attention in severe depression, but they can be addressed secondary to immediate concerns. (B) Impaired thinking and confusion are problems in severe depression that are addressed with administration of medication, through group and individual psychotherapy, and through activity therapy as motivation and interest increase. (C) Possible harm to self as with suicidal ideation; a suicide plan, means to execute plan; and/or overt gestures or an attempt must be addressed as an immediate concern and safety measures implemented appropriate to the risk of suicide. (D) Rest and activity impairment may take time and further assessment to determine client's sleep pattern and amount of psychomotor retardation with the more immediate concern for safety present.

Section: Questions Set B
Explanation:
(A) Increased locomotive skills make push-pull toys appropriate for the energetic toddler. (B) Infants progress from reflex activity through simple repetitive behaviors to imitative behavior. Hand-eye coordination forms the foundation of other movements. (C) At age 8 months, infants begin to have pincer grasp. Toys that help infants develop the pincer grasp are recommended for this age group. (D) Various large colored blocks are suggested toys for infants 6-12 months of age to help visual stimulation.