In which quadrant of the abdominopelvic cavity is the stomach located?

A. The cells will shrink at first, but will later reach equilibrium with the surrounding solution and return to their original condition: If the solute cannot cross the membrane, the cells cannot regain water through solute equilibration, so they will not return to their original size.

B. The cells will show no change due to diffusion of both solute and solvent: In a hypertonic solution where the solute is impermeable, only water can move, so diffusion of solute does not occur and the cell will be affected by water loss.

C. The cells will lose water and shrink: Water moves out of the cell by osmosis to balance the higher extracellular solute concentration. The loss of water causes the cells to shrink, a process called crenation.

D. The cells will swell and ultimately burst: Swelling occurs in a hypotonic solution where water enters the cell due to lower solute concentration outside. In a hypertonic solution, the opposite occurs, so bursting does not happen.

A. Enzyme's active site: The active site of an enzyme has a specific shape and chemical environment that matches the substrate, allowing the enzyme to bind only particular molecules and catalyze a specific chemical reaction efficiently.

B. Product: The product is the result of the reaction, not what determines the enzyme’s specificity. The enzyme’s structure dictates which substrate it can bind.

C. Enzyme-substrate complex: The enzyme-substrate complex forms after the substrate binds to the enzyme’s active site; it is a step in the reaction, not the determinant of specificity.

D. None of the above are correct, because enzymes are not specific: Enzymes are highly specific, with each enzyme typically catalyzing only one type of chemical reaction.