By Linda S. Costanzo
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Written by way of very hot body structure professor Linda S. Costanzo, this revised 5th variation presents a great body structure assessment for college kids getting ready for the USMLE Step 1. The e-book concisely covers key body structure ideas and contains medical correlations to stress connections among body structure and scientific medicine.
* NEW! Full-color layout, stream charts, illustrations, and tables that summarize info for handy review
* each one bankruptcy is written within the renowned Board overview Series (BRS) define layout and lines bolded keyword phrases to streamline your study
* Over 350 USMLE-style questions, solutions, and rationales either electronically and in print make stronger your body structure review
* A FREE significant other web site bargains a web publication and an interactive query financial institution with all of the questions from the booklet so that you can customise your evaluate tests!
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Extra resources for BRS Physiology (5th Edition) (Board Review Series)
1. Pathways in the somatosensory system a. Dorsal column system ■ ■ ■ processes sensations of fine touch, pressure, two-point discrimination, vibration, and proprioception. consists primarily of group II fibers. Course: primary afferent neurons have cell bodies in the dorsal root. Their axons ascend ipsilaterally to the nucleus gracilis and nucleus cuneatus of the medulla. From the medulla, the second-order neurons cross the midline and ascend to the contralateral thalamus, where they synapse on third-order neurons.
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 [IV B]. Because the membrane is permeable only to K+ ions, K+ will diffuse down its concentration gradient from solution A to solution B, leaving some Cl– ions behind in solution A. A diffusion potential will be created, with solution A negative with respect to solution B. Generation of a diffusion potential involves movement of only a few ions and, therefore, does not cause a change in the concentration of the bulk solutions.
5 mM glucose, and 1 mM sucrose solutions are hyposmotic to 1 mM NaCl, whereas 1 mM KCl is isosmotic. 32. The answer is C [II D c]. H+ secretion by gastric parietal cells occurs by H+–K+–adenosine triphosphatase (ATPase), a primary active transporter. 33. The answer is F [IV D 2]. Elevated serum K+ concentration causes depolarization of the K+ equilibrium potential, and therefore depolarization of the resting membrane potential in skeletal muscle. Sustained depolarization closes the inactivation gates on Na+ channels and prevents the occurrence of action potentials in the muscle.
BRS Physiology (5th Edition) (Board Review Series) by Linda S. Costanzo