**Core Concept**
Hyperalimentation, also known as total parenteral nutrition (TPN), is a method of providing essential nutrients to patients who cannot receive feedings or fluids by mouth. The goal is to supply all necessary calories, electrolytes, and nutrients through intravenous (IV) fluids to support the patient's metabolic needs.

**Why the Correct Answer is Right**
In IV hyperalimentation, we typically administer a combination of macronutrients, including amino acids (d), which provide the necessary building blocks for protein synthesis. Amino acids are essential for maintaining muscle mass, wound healing, and supporting the immune system. They are usually provided in a concentration of 3-4% solution. The other options are not the primary components of IV hyperalimentation. **Option A** (hypertonic saline) is used to correct severe hyponatremia, **Option B** (fats) can be added to TPN as a source of calories, but not as the primary component, **Option C** (dextrose) is a source of calories, but not as a primary component in IV hyperalimentation.

**Why Each Wrong Option is Incorrect**
**Option A:** Hypertonic saline is used to correct severe hyponatremia, not as a primary component of IV hyperalimentation.
**Option B:** Although fats can be added to TPN as a source of calories, they are not the primary component.
**Option C:** Dextrose is a source of calories, but not as a primary component in IV hyperalimentation.
**Option E:** Low molecular weight (LMW) dextran is used as a volume expander, not as a primary component of IV hyperalimentation.

**Clinical Pearl / High-Yield Fact**
When administering IV hyperalimentation, it is essential to consider the patient's nutritional needs, including the type and amount of macronutrients required. Amino acids are a crucial component of IV hyperalimentation, supporting protein synthesis and overall patient health.

**Correct Answer:** D. Amino acids