Exam 2: Cell Physiology

The gradient of which ion supplies the energy that drive ATP synthesis by ATP synthase?

Proteins synthesized by the endoplasmic reticulum become permanently separated from the cytosol as soon as they have been synthesized.

Secretion refers to release to the cell's exterior, on appropriate stimulation, of a product produced by the cell

Match the term to its description. -Contains powerful oxidative enzymes important in detoxifying various wastes.

A cilium or flagellum originates from the ____________________, a structure in the cell.

Lysosomes contain ____________________ enzymes that are capable of digesting and removing unwanted debris from the cell.

Microtubules serve as mechanical supports or stiffeners.

____________________ refers to the process of an intracellular vesicle fusing with the plasma membrane, then opening and emptying its contents to the exterior.

Which of the following is the molecular motor that carries secretory vesicles to the ends of the axon?

The accompanying figure relates to the secretion process for proteins by the endoplasmic reticulum. Match the steps highlighted in the figure (steps 1-7) with the statements using the letter key below. -Lysosome also bud off the Golgi complex.

Peroxisomes form ________ from molecular oxygen and the hydrogen atoms stripped from the toxic molecule.

Complete the sentences by matching the appropriate vesicle(s) from the following list. More than one answer may apply. -Contents are unloaded at a specific intracellular compartment.

Match the term to its description. -Are/is composed of tubulin.

Why do we need to breath in, exchange, and deliver to each cell the oxygen molecule?

Keratin is important in the formation of skin cell networks.

Phagocytosis is a specialized form of endocytosis used for bringing in liquids.

Match the term to its description. -Selectively controls movement of molecules between the intracellular fluid and the extracellular fluid.

The lysosomes contain oxidative enzymes.

Match the term to its description. -Consist(s) of actin.

Complete the sentences by matching the appropriate vesicle(s) from the following list. More than one answer may apply. -Enclosed in a clathrin framework.