By Linda S. Costanzo PhD
- NEW! Full-color layout, circulate charts, illustrations, and tables that summarize info for handy review
- Each bankruptcy is written within the well known Board evaluation Series (BRS) define structure and contours bolded keyword phrases to streamline your study
- Over 350 USMLE-style questions, solutions, and rationales either electronically and in print strengthen your body structure review
- A FREE better half web site deals a web ebook and an interactive query financial institution with the entire questions from the publication so that you can customise your evaluation tests!
Read Online or Download BRS Physiology PDF
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Additional resources for BRS Physiology
At the muscle end plate, acetylcholine (ACh) causes the opening of (A) Na+ channels and depolarization toward the Na+ equilibrium potential (B) K+ channels and depolarization toward the K+ equilibrium potential (C) Ca2+ channels and depolarization toward the Ca2+ equilibrium potential (D) Na+ and K+ channels and depolarization to a value halfway between the Na+ and K+ equilibrium potentials (E) Na+ and K+ channels and hyperpolarization to a value halfway between the Na+ and K+ equilibrium potentials (B) Solution A has a lower effective osmotic pressure than solution B (C) Solutions A and B are isosmotic (D) Solution A is hyperosmotic with respect to solution B, and the solutions are isotonic (E) Solution A is hyposmotic with respect to solution B, and the solutions are isotonic 18.
4. Adrenal medulla is a specialized ganglion of the sympathetic nervous system. ■ ■ ■ Preganglionic fibers synapse directly on chromaffin cells in the adrenal medulla. The chromaffin cells secrete epinephrine (80%) and norepinephrine (20%) into the circulation (see Figure 2-1). Pheochromocytoma is a tumor of the adrenal medulla that secretes excessive amounts of catecholamines and is associated with increased excretion of 3-methoxy4-hydroxymandelic acid (VMA). B. Neurotransmitters of the ANS ■ ■ ■ Adrenergic neurons release norepinephrine as the neurotransmitter.
Repeated stimulation of a skeletal muscle fiber causes a sustained contraction (tetanus). Accumulation of which solute in intracellular fluid is responsible for the tetanus? (A) (B) (C) (D) (E) (F) (G) (H) Na+ K+ Cl– Mg2+ Ca2+ Troponin Calmodulin Adenosine triphosphate (ATP) 7. Solutions A and B are separated by a membrane that is permeable to Ca2+ and impermeable to Cl–. Solution A contains 10 mM CaCl2, and solution B contains 1 mM CaCl2. 3 RT/F = 60 mV, Ca2+ will be at electrochemical equilibrium when (A) solution A is +60 mV (B) solution A is +30 mV 23 98761_Ch01 5/7/10 6:38 PM Page 24 24 Board Review Series: Physiology (C) (D) (E) (F) (G) solution A is –60 mV solution A is –30 mV solution A is +120 mV solution A is –120 mV the Ca2+ concentrations of the two solutions are equal (H) the Cl– concentrations of the two solutions are equal 8.