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sample_final - NPB 101 Sample Final Multiple Choice...

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NPB 101 Sample Final Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Select the incorrect statement regarding the plasma membrane. a. selectively controls movement of molecules between the ECF and the ICF. b. is the barrier that surrounds the blood vessels and separates the blood plasma from the interstitial fluid. c. contains proteins that provide membrane functions. d. has cholesterol to maintain rigidity. e. serves as a mechanical barrier to hold in the contents of the cell. ____ 2. The concentration gradient for Na + ____ 3. Which of the following is responsible for the falling phase of an action potential? ____ 4. The universal energy currency in cells is ____ 5. Select the correct statement about diffusion. a. the chemical gradient of a substance does not affect its initial rate of net diffusion. b. it depends on random (thermal) motion of molecules. c. during diffusion, there is a net movement of molecules from an area of lower concentration to an area higher concentration. d. its rate increases as the temperature decreases. e. at equilibrium there is no movement of molecules. ____ 6. Extrusion of materials to the exterior of the cell through the plasma membrane is called
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____ 7. The two systems concerned with the control of body functioning are ____ 8. The blind spot ____ 9. Sequence the following events correctly. 1. an excitatory postsynaptic potential (EPSP) occurs. 2. calcium induces exocytosis of neurotransmitter. 3. action potential invades presynaptic terminal. 4. neurotransmitter is packed into synaptic vesicles. 5. neurotransmitter binds to receptor on chemically-gated channel. a. 1, 4, 5, 2, 3 b. 4, 3, 1, 5, 2 c. 2, 1, 5, 4, 3 d. 4, 3, 2, 5, 1 e. 3, 4, 2, 5, 1 ____
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