Final answer:
The cell wall is permeable, allowing substances to pass through it freely, unlike the selectively permeable cell membrane that can control the passage of substances.
Step-by-step explanation:
The term that describes the cell wall is permeable. Unlike cell membranes, which are selectively permeable due to their structure and can control the substances that pass through, the cell wall allows substances to pass relatively freely. Impermeable, differentially permeable, or permeable?" is c. Permeable.
Selectively permeable means that the membrane can regulate the entry and exit of certain molecules, allowing some to pass through while blocking others. The direction of diffusion can indeed be influenced by the membrane because it confines the movement of substances to those it permits based on molecular size, polarity, or the presence of specific transport proteins.
Two examples of phospholipid soluble molecules are oxygen and carbon dioxide. These molecules can move across the cell membrane through simple diffusion, where their movement is affected by the concentration gradient, moving from an area of higher to lower concentration.