Ch 5 Quiz

The movement of substances against the concentration gradient. A. Active transport B. Passive transport

A. Active transport

The movement of substances through proteins embedded in the cell membrane: requires an input of energy. A. Active transport B. Passive transport

A. Active transport

Which statement about the Na+/K+ pump is false? A. It trasnports Na+ and K+ in a 1:1 ratio. B. It transports Na+ out of the cell and K+ into the cell. C. It is present in neurons. D. Its activity requires energy input.

A. It trasnports Na+ and K+ in a 1:1 ratio.

Caveolae and clathrin-coated pits are both used in _____ . A. endocytosis B. exocytosis C. phagocytosis D. All the answers are correct. E. None of the answers are correct

A. endocytosis

Permeability is a property of _____ . A. membranes B. ions C. solutes D. solvents E. proteins

A. membranes

Tends to create an equilibrium state. A. Active transport B. Passive transport

B. Passive transport

The movement of substances from an area of high concentration to an area of low concentration. A. Active transport B. Passive transport

B. Passive transport

Facilitated diffusion and active transport differ in that _____ . A. facilitated diffusion uses a substrate to bind to a protein carrier, where as active transport does not B. adenosine triphosphate is necessary for active transport, but not for faciiltated diffusion C. facilitated diffusion moves water across the cell membrane, whereas active transport does not D. potential energy is required for active transport but not for facilitated diffusion E. facilitated diffusion uses cell membrane proteins to substances, whereas active transport does not

B. adenosine triphosphate is necessary for active transport, but not for faciiltated diffusion

What are the two extracellular fluid compartments in the body? A. iintracellular fluid and plasma B. plasma and interstitial fluid C. interstitial and intracellular fluid D. plasma and the fluid portion of the blood E. None of the answers are correct.

B. plasma and interstitial fluid

A cell that is permeable to Solute X is placed into a solution containing a higher concentration of X. Diffusion occurs until equilibrium is reached. At this time, _____ . A. there is no futher movement of Solute X across the membrane B. there is no further change in concentration of Solute X C. Both A and B are correct. D. Neither A or B is correct.

B. there is no further change in concentration of Solute X

A cell transports large molecules out of the cell by _____ . A. active transport B. endocytosis C. exocytosis D. phagocytosis E. diffusion

C. exocytosis

Water will always move from _____ areas to _____ areas, if the membrane is permeable to water. A. hypertonic, isotonic B. hypertonic, hypotonic C. hypotonic, hypertonic D. isotonic, hypotonic

C. hypotonic, hypertonic

Which body fluid compartment contains high levels of K+, large anions, and proeins? A. plasma B. interstitial fluid C. intracellular fluid D. A and B are correct E. A and C are correct

C. intracellular fluid

Which is not a type of mediated transport? A. facilitated diffusion B. primary active transport C. simple diffusion D. secondary active transport

C. simple diffusion

Gated channels for sodium ions may include _____ . A. mechanical gates, which respond to pressure B. chemical gates, which respond to ligands C. voltage gates, which respond to electrical signals D. All of the answers are correct. E. None of the answers are correct.

D. All of the answers are correct.

Which is not true about diffusion in the human body? A. Net movement of molecules occurs until the concentration is equal. B. Diffusion occures faster at higher temperatures. C. Diffusion is rapid over short distances and slower over longer distances. D. Smaller molecules take longer to diffuse than larger ones.

D. Smaller molecules take longer to diffuse than larger ones.

Hyposmotic solutions have _____ . A. higher concentrations of solutes than hyperosmotic solutions B. lower concentrations of solutes than other hyposmotic solutions C. the same cnocentration of solutes as hyperosmotic solutions D. lower concentratioins of solutes than hyperosmotic solutions E. None of the answers are correct.

D. lower concentratioins of solutes than hyperosmotic solutions

In an epithelium, the apical membrane is also known as the _____ membrane. A. serosal B. basolateral C. basement D. mucosal E. nictitating

D. mucosal

The term cellular (metabolic) energy indicates any biological process requiring _____ . A. adenosine triphosphate B. ATP C. thermal energy D. chemical energy E. A and B are correct F. C and D are correct

E. A and B are correct

Passive transport refers to a process that requires no _____ . A. energy at all B. concentration gradient C. electrical gradient D. pressure gradient E. input of energy

E. input of energy

Match the membrane protein with its function. Structural proteins Enzymes Receptors Transporters All Answer Choices A. Catalyze chemical reactions. B. Forms cell junctions. C. Move substances across membranes. D. Bind ligands as part of chemical signaling.

Structural proteins- B Enzymes- A Receptors- D Transporters- C

Compared to the outside surface, the inside of a resting cell membrane is _____ .

negatively charged