WCU PHYS 261 FINAL EXAM QUESTIONS AND ANSWERS LATEST VERSION ALREADY PASSED (WEST COAST UNIVERSITY) The function of transverse tubules is to - ANSWER ✔✔rapidly conduct action potentials to the interior of the muscle fiber. Which is greater: A) blood pressure when the peripheral vessels constrict B) blood pressure when the peripheral vessels dilate - ANSWER ✔✔A) blood pressure when the peripheral vessels constrict The P wave of an ECG corresponds to - ANSWER ✔✔depolarization of the atria The reflex that compliments a withdrawal reflex by making compensatory adjustments on the opposite side of the body receiving the stimulus is the - ANSWER ✔✔crossed extensor reflex Your instructor announces a pop quiz. Which would you expect? - ANSWER ✔✔Increased sympathetic signaling and increased cardiac output This protein is activated by the Ca2+ -calmodulin complex to phosphorylate the myosin light chain protein. - ANSWER ✔✔myosin light chain kinase In which situation would end - systolic volume (ESV) be the greatest? - ANSWER ✔✔when parasympathetic stimulation of the heart is increased Striated muscles are so - called because of a repeating pattern of light and dark bands. One repeating unit of the banding pattern is called a - ANSWER ✔✔Sarcomere The contraction cycle is initiated by the rise in _______ released from the sarcoplasmic reticulum (SR). - ANSWER ✔✔Ca2+ The cardiac output is equal to the - ANSWER ✔✔product of heart rate and stroke volume The importance of the plateau phase of the action potential of myocardial cells is in - ANSWER ✔✔preventing tetanus If cardiac output increases and resistance in arterioles does NOT change, what happens to arterial blood pressure? - ANSWER ✔✔increases The action potential traveling along the t -tubule changes the conformation of the - ANSWER ✔✔dihydropyridine (DHP) receptor (L - type calcium channel) Restoring lost fluid from the capillaries back to the circulatory system is one of the major functions of the ________ system. - ANSWER ✔✔lymphatic An increase in plasma potassium levels is properly called - ANSWER ✔✔hyperkalemia Chief cells secrete - ANSWER ✔✔pepsinogen The hormone vasopressin - ANSWER ✔✔stimulates kidneys to retain water The enzyme renin is responsible for the production of - ANSWER ✔✔Angiotensin I A glomerulus is - ANSWER ✔✔a "ball" of capillaries within Bowman's capsule Dehydration leads to ________ blood volume, ________ blood pressure, and ________ osmolarity. - ANSWER ✔✔decreased, decreased, increased G cells of the stomach secrete - ANSWER ✔✔gastrin Increased angiotensin II levels would result in increased - ANSWER ✔✔a. blood volume b. retention of water c. blood pressure d. retention of sodium ions at the kidney (All of the above) The Bowman's capsule and glomerulus make up the - ANSWER ✔✔renal corpuscle Which ion is NOT directly regulated by the kidney? - ANSWER ✔✔OH- Short reflexes of the digestive system are integrated in the __________ nervous system - ANSWER ✔✔enteric movement from the glomerulus to the nephron lumen - ANSWER ✔✔filtration Bile salts aid in the digestion of fats by ________ large fat droplets. - ANSWER ✔✔emulsifying The hormone that directly controls water reabsorption by the kidneys is - ANSWER ✔✔ADH vasopressin Bile is secreted from the _______ and stored in the ________. - ANSWER ✔✔liver, gallbladder
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