QuestionQuestion 1 of 323.0/ 3.0 PointsThe humerus fits into what at the shoulder?A.acetabulumB.clavicleC.acromion processD.glenoid cavityE.olecranon processQuestion 2 of 323.0/ 3.0 PointsWhat two hormones are involved in regulating the blood calcium level?A.calcitonin and reninB.renin and aldosteroneC.renin and PTHD.aldosterone and PTHE.PTH and calcitoninQuestion 3 of 323.0/ 3.0 PointsHow many vertebrae are there?A.5B.10C.18D.24E.33Question 4 of 323.0/ 3.0 PointsWhich function of the skeletal system requires the leg bones to be extremely strong?A.They support the entire body.B.They protect soft body parts.C.They produce blood cells.D.They store minerals and fat.E.They permit flexible body movement.Question 5 of 323.0/ 3.0 PointsWhich bone is part of the pectoral girdle?A.clavicleB.radiusC.ulnaD.carpalsE.manubriumQuestion 6 of 323.0/ 3.0 PointsWhat is the name of the small gap that separates the axon terminal of a nerve from the sarcolemma?A.T tubuleB.sliding filamentC.synaptic cleftD.synaptic vesicleE.sarcoplasmic reticulumQuestion 7 of 323.0/ 3.0 PointsWhat ion is responsible for initiating muscle contraction?A.Mg2+B.Ca2+C.H+D.Cl-E.Na+Question 8 of 323.0/ 3.0 PointsOne sarcomereA.extends from Z line to Z line.B.is composed of many myofibrils.C.contains only actin fibers.D.is composed of many muscle fibers.E.surrounds each muscle in the body.Question 9 of 323.0/ 3.0 PointsWhat is found within the intercalated disks of cardiac muscle?A.sarcoplasmic reticulumB.gap junctionsC.dense connective tissueD.boneE.myoglobinQuestion 10 of 323.0/ 3.0 PointsWhat is the name of a sudden and involuntary muscular contraction, often accompanied by pain?A.bursitisB.sprainC.strainD.ticE.spasmQuestion 11 of 323.0/ 3.0 PointsOf the three types of muscle tissue, which is not striated?A.smooth muscleB.cardiac muscleC.skeletal muscleD.skeletal and smooth lack striationsE.cardiac and smooth lack striationsQuestion 12 of 323.0/ 3.0 PointsThe cerebrum is associated with theA.two lateral ventricles.B.third ventricle.C.fourth ventricle.D.posterior ventricle.E.anterior ventricle.Question 13 of 323.0/ 3.0 PointsWhat type of memory does language depend upon?A.short-termB.semanticC.episodicD.skillE.long termQuestion 14 of 323.0/ 3.0 PointsWhich of the following is not a function of the nervous system?A.receive sensory inputB.cushion and protect soft tissueC.perform information processingD.perform integrationE.generate motor outputQuestion 15 of 323.0/ 3.0 PointsThe spinal cord belongs to theA.peripheral nervous system.B.central nervous system.C.axial nervous system.D.appendicular nervous system.E.none of these.Question 16 of 323.0/ 3.0 PointsLong term use of heroin results in which set of symptoms?A.weight gain, poor cognitive performance, irritabilityB.cardiac and/or respiratory arrest, sudden deathC.apathy, euphoria, hallucinationsD.addiction, hepatitis, HIV/AIDS, various bacterial infectionsE.anxiety, jitters, insomnia, headachesQuestion 17 of 323.0/ 3.0 PointsWhich of the following is part of the limbic system?A.spinal cordB.primary somatosensory areaC.amygdalaD.reticular formationE.cerebellumQuestion 18 of 323.0/ 3.0 PointsWhich disorder of the eye is due to the cornea or lens being uneven resulting in a fuzzy image?A.astigmatismB.glaucomaC.color blindnessD.nearsightednessE.farsightednessQuestion 19 of 323.0/ 3.0 PointsThe utricle is especially sensitive to what type of movements?A.back and forthB.up and downC.standing upsideD.spinning aroundE.bending overQuestion 20 of 323.0/ 3.0 PointsWhich structure in the eye refracts and focuses light rays?A.lensB.humorsC.cone cellsD.retinaE.pupilQuestion 21 of 323.0/ 3.0 PointsThe summing up of nerve signals by _____________________ is called __________________.A.the reticular activating system, perceptionB.the cerebral cortex, sensationC.sensory receptors, sensationD.the cerebral cortex, perceptionE.sensory receptors, integrationQuestion 22 of 323.0/ 3.0 PointsWhat type of exteroceptors are located in the ear?A.mechanoreceptorsB.chemoreceptorsC.photoreceptorsD.thermoreceptorsE.none of theseQuestion 23 of 323.0/ 3.0 PointsWhy does wave summation occur?A.Muscle fibers have been allowed to fully relax.B.A large amount of time elapses between stimulations.C.Muscle fibers are partially contracted when the next stimulus arrives.D.Muscle twitches are not yet overlapping.Question 24 of 323.0/ 3.0 PointsIn the lab, a researcher finds that the threshold stimulus to induce an action potential in a muscle fiber’s sarcolemma was 3.0 volts. Which of the following would result in muscle tension?A.1.0 voltB.2.0 voltsC.3.0 voltsD.4.0 voltsE.3.0 volts and 4.0 voltsQuestion 25 of 323.0/ 3.0 PointsA motor unit is defined as _______.A.a single neuron and a single muscle fiberB.a nerve and a muscleC.the axon terminals of a single motor neuron and all of the muscle fibers that it stimulatesD.a single muscle fiber and all its axon terminalsQuestion 26 of 323.0/ 3.0 PointsWhen wave summation occurs, _______.A.individual muscle twitches are separatedB.the muscle force generated decreasesC.the muscle fiber has received a single stimulus eventD.the muscle force generated increasesQuestion 27 of 323.0/ 3.0 PointsWhich of the following is NOT a phase of a muscle twitch?A.contraction phaseB.shortening phaseC.relaxation phaseD.latent periodQuestion 28 of 323.0/ 3.0 PointsContraction of a skeletal muscle that results from a single stimulus is called a ________.A.contraction phaseB.twitchC.motor unitD.tetanusQuestion 29 of 323.0/ 3.0 PointsWhich of the following describes the relaxation phase?A.The sarcomeres are increasing in length, and the force generated increases.B.The sarcomeres are increasing in length, and the force generated decreases.C.The sarcomeres are decreasing in length, and the force generated increases.D.The sarcomeres are decreasing in length, and the force generated decreases.Part 6 of 7 – 0.0/ 8.0 Points Answer the following question in your own words without using any resources. Your answer should be written in complete sentences using correct grammar, spelling, and terminology.Question 30 of 320.0/ 4.0 PointsBriefly describe “wave summation.”Question 31 of 320.0/ 4.0 PointsBriefly describe “treppe.” 

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