Refer to the Two Figures Below

question 144

Multiple Choice

Refer to the two figures below. The figures show the interaction of the same human muscle cell with oxygen and carbon dioxide.Which statement is correct and supported by these figures?

• A) When a substance is present at a high concentration outside of a cell, the substance diffuses into the cell, but when a substance builds up inside a cell, it must be pumped out.
• B) The arrows in the two figures indicate that molecules move in only one direction and never in the opposite direction during diffusion.
• C) Once the concentrations of a substance are equal on both sides of the membrane, particles stop moving and diffusion stops.
• D) Diffusion across the cell membrane occurs in cases of small nonpolar molecules and involves a net movement of molecules in the direction from high to low concentration.
• E) Diffusion of substances across a cell membrane differs from diffusion of substances in solution in that equilibrium is achieved only in the case of the cell membrane.

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Definitions:

Marginal Product

It refers to the increase in output that arises from an additional unit of input, highlighting the incremental gains in production.

Marginal Profit

Marginal profit is the increase in profit that results from selling an additional unit of a product or service.

Marginal Product

The additional output resulting from one more unit of a particular input, showing the contribution of that input to total production.

Marginal Product

The additional output resultant from increasing one unit of a specific input, holding all other inputs constant.