MCQ Chapter 16 Biology Class 11 Maharashtra Board Skeleton and Movement 1. Which type of muscle is responsible for involuntary movements like peristalsis in the alimentary canal?Skeletal muscleCardiac muscleSmooth muscleStriated muscleQuestion 1 of 202. What is the term for the change in locus of the whole body of a living organism from one place to another?MovementLocomotionContractionExtensionQuestion 2 of 203. Which type of movement is performed by pseudopodia, as seen in leucocytes?Ciliary movementWhorling movementAmoeboid movementMuscular movementQuestion 3 of 204. How many unpaired muscles are there in the human body?612634640Question 4 of 205. Which muscle type assists the prime movers during movement?AgonistsAntagonistsSynergistsExtensorsQuestion 5 of 206. What is the term for the end of a muscle attached to a stationary bone?InsertionBellyOriginTendonQuestion 6 of 207. Which muscles work in pairs to produce opposite actions, such as flexion and extension?SynergistsAntagonistic musclesPrime moversSphinctersQuestion 7 of 208. Which muscle is stronger in the antagonistic pair of biceps and triceps?TricepsBicepsBoth are equally strongDepends on the individualQuestion 8 of 209. What is the fundamental characteristic of a muscle?ExtensionContractionRelaxationRotationQuestion 9 of 2010. Which protein constitutes 55% of muscle proteins?ActinTropomyosinMyosinTroponinQuestion 10 of 2011. What is the name of the contractile unit of muscles?MyofibrilSarcomereCross bridgeActin filamentQuestion 11 of 2012. Which component of the actin filament physically covers the active binding sites for myosin in the resting stage?TroponinF actinTropomyosinG actinQuestion 12 of 2013. What initiates the contraction process in muscles by interacting with troponin?Sodium ionsCalcium ionsPotassium ionsMagnesium ionsQuestion 13 of 2014. According to the sliding filament theory, what is the basic cause of muscular contraction?Interaction between actin and myosinBreakdown of ATP aloneMovement of tropomyosinRelease of calcium ionsQuestion 14 of 2015. What happens to the troponin-tropomyosin complex during muscle contraction?It binds to myosinIt becomes inactivatedIt covers the active sitesIt releases ATPQuestion 15 of 2016. What is the term for the muscular stiffening that occurs after death?Muscle twitchTetanusRigor mortisOxygen debtQuestion 16 of 2017. What is a single muscle twitch?A continuous contractionA contraction initiated by a single brief stimulationA rapid and frequent stimulationA state of permanent contractionQuestion 17 of 2018. What is the term for the phenomenon where repeated stimuli produce increasing strength of contraction?TetanusSummationRefractory periodThreshold stimulusQuestion 18 of 2019. What is the minimum strength of stimulus required for a muscle fiber to contract?Refractory stimulusThreshold stimulusTetanus stimulusSummation stimulusQuestion 19 of 2020. What principle states that a muscle fiber contracts either fully or not at all?Sliding filament principleAll or none principleOxygen debt principleSummation principleQuestion 20 of 20 Loading...
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