CBSE Class 11 (Science) Locomotion and Movement — practice questions
87 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Locomotion and Movement in the app →RIGOR MORTIS (stiffness after death) occurs because:An adult human skeleton has approximately how many bones?The pectoral girdle in humans consists of:The KNEE joint is an example of which type of synovial joint?SLOW-TWITCH (Type I, red) muscle fibres are characterised by:A white blood cell crawls towards a germ using pseudopodia. This movement is:Dust you breathe in is swept out of the trachea by the beating of:A sperm swims using its:Muscles attached to bones look striped under a microscope, so they are called:Muscles in the wall of the gut push food along without your control. They are:Heart muscle is striated yet the nervous system does not control it directly, so it is:The plasma membrane of a muscle fibre is called the:In a resting muscle, which protein subunit hides the myosin-binding sites on actin?The globular head of myosin works as an enzyme that splits:After a hard run your muscles ache because they built up:The red oxygen-storing pigment inside muscle is:Bone matrix is very hard because of:A U-shaped bone at the base of the mouth cavity, counted with the skull, is the:The first vertebra, which meets the skull's occipital condyles, is the:The last two pairs of ribs are not attached in front, so they are called:The knee cap is a cup-shaped bone called the:The collar bone is properly called the:When a muscle moves a bone, the joint acts as the:Skull bones fuse with sutures and cannot move. This joint type is:The joint between the atlas and axis that lets you shake your head is a:An autoimmune disease attacking the neuromuscular junction and causing weakness is:Which cells of the human body show amoeboid movement?Amoeboid movement in body cells is effected by which structures?Coordinated beating of cilia in the trachea helps in doing what?Movement of ova along the female reproductive tract is helped by which movement?Muscle tissue arises embryonically from which germ layer?What share of an adult human's body weight is contributed by muscles?Which set lists the special properties of muscle tissue?Based on location, which three types of muscle are identified?Visceral muscles are found in the inner walls of which organs?Muscle bundles in a skeletal muscle are held together by a layer of collagenous tissue called what?Why is a skeletal muscle fibre described as a syncitium?Which organelle of a muscle fibre serves as the store house of calcium ions?The light band of a myofibril, containing actin, is also known as which band?Which structure bisects the I band at its centre?What holds the thick filaments together in the middle of the A band?The functional unit of contraction lies between two successive what?How many F actin strands are helically wound together in one thin filament?Each filamentous F actin is a polymer of which monomer?Which complex protein sits at regular intervals along tropomyosin on the thin filament?The tail part of a meromyosin molecule is called what?The projecting head and short arm of a myosin monomer form what structure?A motor neuron together with the muscle fibres it supplies is called what?The junction between a motor neuron and a muscle fibre's sarcolemma is also called what?Which neurotransmitter released at the neuromuscular junction starts an action potential in the sarcolemma?Calcium ions released into the sarcoplasm bind to what on the actin filaments?Cross bridges pull the attached actin filaments towards the centre of which region?During contraction of a sarcomere, which band does not change in length?Muscle relaxation follows once Ca++ ions are pumped back into what?What binding to the myosin head breaks an existing cross bridge?Muscle fatigue arises from anaerobic breakdown of which stored carbohydrate?Which fibres have plenty of mitochondria and are called aerobic muscles?White muscle fibres chiefly rely on which kind of energy process?The slightly pliable matrix of cartilage is due to which salts?How many bones does the human axial skeleton comprise?How many bones make up the facial region of the human skull?Which three tiny bones are found in each middle ear?The skull joins the vertebral column through how many occipital condyles?How many lumbar vertebrae does the human vertebral column have?Almost all mammals, humans included, have how many cervical vertebrae?Which canal inside each vertebra carries the spinal cord?The sternum is a flat bone found on which part of the body?Why is a rib called bicephalic?The 8th, 9th and 10th pairs of ribs join which rib through hyaline cartilage?How many bones does each human limb contain?Which is the longest bone of the human body?How many phalanges (digit bones) are there in each human hand or foot?A depression below the acromion that receives the humerus head is called what?Each half of the pectoral girdle consists of which two bones?Each coxal bone of the pelvic girdle is formed by fusion of which three bones?The thigh bone fits into which cavity of the pelvic girdle?The pubic symphysis, where pelvic halves meet in front, contains which tissue?The joint between adjacent vertebrae, allowing limited movement, is of which type?Synovial joints are characterised by the presence of what between the bones?The shoulder joint between humerus and pectoral girdle is which type of joint?The joint between the carpal and metacarpal of the thumb is which type?The joints between the wrist bones (carpals) are which type?Which disorder is an autoimmune condition affecting the neuromuscular junction?Progressive degeneration of skeletal muscle, mostly genetic, is called what?Rapid wild muscle spasms due to low Ca++ in body fluid are known as what?Gout is caused by accumulation of which substance in the joints?Decreased levels of which hormone commonly contribute to osteoporosis?