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Locomotion and Movement Test - 36

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Locomotion and Movement Test - 36
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  • Question 1
    1 / -0
    The joint between the human skull bones is
    Solution
    A suture is a type of fibrous joint that is only found in the skull. The bones are bound together by Sharpey's fibers. A tiny amount of movement is permitted at sutures, which contributes to the compliance and elasticity of the skull which is immovable.
    So, the correct option is 'Immovable joint'.
  • Question 2
    1 / -0
    The microfilaments of a muscle
    Solution
    • Myofilament is the filaments of myofibrils, constructed from proteins, principally myosin or actin.
    • They are made up of thick and thin myofilament, which helps to give it a striped appearance.
    So, the correct option is 'all of the above'.
  • Question 3
    1 / -0
    The proteins found in the filaments of muscle fibres are
    Solution
    Skeletal muscle is composed of muscle fibres which have smaller units called myofibrils. There are three types of proteins make up each myofibril; they are contractile, regulatory and structural proteins. By contractile proteins, we mean actin (thin filament) and myosin (thick filament).
    So, the correct option is 'actin and myosin'.
  • Question 4
    1 / -0
    During strenuous muscular activity, hydrogens removed from sugar molecules are accepted temporarily by .......... to form..........        
    Solution
    During the strenuous muscular activity, hydrogens removed from sugar molecules are accepted temporarily by pyruvate to form lactic acid.
    So, the correct option is 'pyruvate; lactic acid'.
  • Question 5
    1 / -0
    In a muscle fibre
    Solution
    Terminal cisternae are enlarged areas of the sarcoplasmic reticulum surrounding the transverse tubule because terminal cisternae ensure rapid calcium delivery, they are well developed in muscles that contract quickly such as fast-twitch skeletal muscle.
    So, the T system contains calcium storage sacs.
  • Question 6
    1 / -0
    In thoracic cavity of man which one is present
    Solution
    The thoracic cavity is also known as the chest cavity. It is a chamber in the body of the animal that is protected by the ribcage, skin and the muscles.
    The essential organs that are present in the thoracic cavity are the lungs, the heart, a small part of the oesophagus and various lymph nodes and blood vessels.
    So, the correct option is 'lungs+heart'
  • Question 7
    1 / -0
    The 'thick' filament in muscles is a polymerised protein of
  • Question 8
    1 / -0
    Biceps muscles connect humerous with the ________
    Solution
    The biceps, also known as biceps brachii lies on the front of the upper arm between the shoulder and the elbow. The biceps brachii has two heads, or origins. Both heads originate on the scapula. The long head attaches to the supraglenoid tubercle of the scapula, which is just above the space where the humerus, or upper arm, enters the shoulder. The short head attaches to the coracoid process of the scapula. Both heads converge into one muscle, that runs the length of the humerus. The biceps brachii crosses the inside of the elbow and attaches at the radial tuberosity, which is a feature on the radius - one of the two bones (Ulna is other bone) in- the lower arm. In this way it attaches humerus with the radius and ulna. 
    So, the correct option is 'Radius, ulna'.
  • Question 9
    1 / -0
    Which muscles having functionally multinucleated conditions?
    Solution
    There are cardiac, skeletal and smooth muscle cells of which only skeletal or voluntary muscle cells are multinucleated. Such cells are syncytial. Skeletal muscle cells arise in the embryo as uninucleated entities. Later the cells fuse to give rise to the multinucleated muscle fibre.
    So the correct answer should be option C "voluntary muscles".
  • Question 10
    1 / -0
    Actin binding sites are located on:
    Solution
    Actin belongs to the family of globular multifunctional protein that forms microfilaments in muscle fibers. The associated proteins along with actin found in thin filaments are troponin and tropomyosin.however the binding sites are located in meromyosin.
    So, the correct option is 'meromyosin'.

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