If the hydrogen ion increases in a solution, the pH will

A. NaOH: Sodium hydroxide is an inorganic compound because it does not contain carbon-hydrogen bonds. It is a strong base used in many chemical processes but is not classified as organic.

B. NaCl: Sodium chloride is an ionic compound formed from sodium and chlorine ions. It lacks carbon altogether, making it an inorganic molecule rather than an organic one.

C. H2O: Water is vital for life and serves as a universal solvent, but it is a simple molecule without carbon. Since organic molecules require carbon, water is inorganic.

D. CH4: Methane (CH4) is an organic molecule because it consists of carbon bonded to hydrogen atoms. The presence of carbon-hydrogen bonds defines it as organic.

A. Pinocytosis: Pinocytosis is the process by which cells engulf extracellular fluid and dissolved solutes. It is a form of “cell drinking” and occurs in many cell types but is not specialized for attacking pathogens.

B. Phagocytosis: Phagocytosis is the process by which certain cells, such as macrophages and neutrophils, engulf large particles, bacteria, or debris. It is a key mechanism in the immune response, allowing white blood cells to destroy pathogens.

C. Exocytosis: Exocytosis is the process of vesicles fusing with the plasma membrane to release substances outside the cell. While important for secretion, it is not the mechanism by which pathogens are engulfed.

D. Intracellular vesicular trafficking: This refers to the movement of vesicles within a cell to transport molecules between organelles. It is involved in normal cellular logistics but does not directly involve engulfing pathogens.