Exam2Practice Ch6 Communication Ch7 Endocrine Ch8 Neurons

Exam2Practice Ch6 Communication Ch7 Endocrine Ch8 Neurons -...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which body fuid compartment contains high levels oF K + , large anions, and proteins? A) plasma B) interstitial fuid C) intracellular fuid D) A and C E) A and B 1) 2) What are the two extracellular fuid compartments in the body? A) interstitial and intracellular B) plasma and interstitial C) intracellular and plasma D) plasma and the fuid portion oF the blood E) none oF the above 2) 3) Which oF the Following statements about the resting membrane potential is TRUE? A) It is normally equal to zero volts. B) It results, in part, From the concentration gradients For Na + and K + . C) The inside oF the membrane is positively charged compared to the outside. D) It is due in part to the presence oF extracellular proteins. 3) 4) Voltage - gated (voltage - dependent) channels and antiport carriers are both types oF A) receptors. B) structural proteins. C) transporters. D) enzymes. 4) 5) The resting membrane potential in a typical nerve cell is approximately A) - 35 mV. B) + 70 mV. C) - 70 mV. D) + 35 mV. E) 0 mV. 5) 6) Caveolae and clathrin - coated pits are both used in A) endocytosis. B) phagocytosis. C) exocytosis. D) action potentials E) neurotransmitters 6) 7) The ion that plays a key role in initiating electrical signals in neurons is A) Ca 2 + . B) Na + . C) K + . D) Cl - . 7) A - 1
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8) Passive transport refers to a process that requires A) no electrical gradient. B) no energy at all. C) no cellular energy. D) no concentration gradient. E) no pressure gradient. 8) SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Match the transport process to its description. A. active transport B. passive transport 9) the movement of molecules from an area of high concentration to an area of low concentration 9) 10) the movement of molecules via proteins embedded in the cell membrane; requires ATP 10) 11) the movement of molecules against the concentration gradient 11) 12) tends to create an equilibrium state 12) Match the potential or potential change with the causative circumstances. Assume ion movements are net movements. Answers may be used more than once or not at all. A. resting membrane potential B. hyperpolarization C. depolarization D. repolarization E. more than one of the above 13) Na + enters the cell 13) 14) K + leaves the cell 14) 15) The Na + - K + - ATPase pumps __________ Na + ions into/out of the cell and __________ K + into/out of the cell. 15) 16) The ability of a carrier molecule to transport only one speciFc molecule or a group of closely related molecules is called __________.
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This note was uploaded on 01/03/2012 for the course BIO 308 taught by Professor Acbrown during the Spring '10 term at Portland.

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Exam2Practice Ch6 Communication Ch7 Endocrine Ch8 Neurons -...

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