CLINICAL MEDICINE

Detailed explanation-1: -Answer and Explanation: The hydrophilic part of the steroid will interact with water. The hydrophobic part, made of carbon and hydrogen atoms, does not interact with water.

Detailed explanation-2: -Steroids are overall hydrophobic because of their common tetracyclic hydrocarbon core (Figure 1G).

Detailed explanation-3: -The carrier proteins involved in facilitated diffusion simply provide hydrophilic molecules with a way to move down an existing concentration gradient (rather than acting as pumps).

Detailed explanation-4: -Small lipids and steroids are hydrophobic and can readily cross the membrane. Molecules that are hydrophilic, on the other hand, cannot pass through the cell membrane-at least not without help-because they are water-loving like the exterior of the membrane, and are therefore excluded from the interior of the membrane.