摘要: 1.The answer is A (Ⅱ A 1, C).Both types of transport occur down an electrochemical gradient ("downhill") and do not require metabolic energy.Saturability and inhibition by other sugars are characteristic only of carrier-mediated glucose transport; thus, facilitated diffusion is saturable and inhibited by galactose, whereas simple diffusion is not. 2.The answer is D (Ⅳ E 1 a, b, 2 b).During the upstroke of the action potential, the cell depolarizes or becomes less negative.The depolarization is caused by inward current, which is, by definition, the movement of positive charge into the cell.In nerve and in most types of muscle, this inward current is carried by Na+. 3.The answer is D ... 目录: Preface Acknowledgments 1.CELL PHYSIOLOGY Ⅰ.Cell Membranes Ⅱ.Transport Across Cell Membranes Ⅲ.Osmosis Ⅳ.Diffusion Potential, Resting Membrane Potential, and Action Potential Ⅴ.Neuromuscular and Synaptic Transmission Ⅵ.Skeletal Muscle Ⅶ.Smooth Muscle Ⅷ.Comparison of Skeletal Muscle, Smooth Muscle, and Cardiac Muscle Review Test 2.NEUROPHYSIOLOGY Ⅰ.Autonomic Nervous System (ANS) Ⅱ.Sensoru Systems Ⅲ.Motor Systems Ⅳ.Higher Functions of the Cerebral Cortex Ⅴ.Blood—Brain Barrier and Cerebrospinal Fluid (CSF) Ⅵ.Temperature& ...
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