Locomotion and Movement

Multiple Choice Questions

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Which of the following is important for muscle contraction and nerve impulse transmission?

  • Ca2+ ions

  • Mg2+ ions

  • Both (a) and (b)

  • Fe2+ ions

A.

Ca2+ ions

Ca2+ ions are essential for muscle contraction, neutro- muscular functions and nerve impulse transmission. During its transmission, impulse arrives at a synaptic knob, Ca2+ ions diffuse into the knobs from surrounding tissue fluid.

It basically triggers a process in which numerous synaptic vesicles fuse with the membrane of the knob and the areas of fusion break down, releasing the contents of vesicles into the fluid of synaptic clefts.

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    One animal that does not perform locomotion is

    • Sycon

    • Nereis

    • Sepia

    • Euglena

    Answer

    During strenuous excercise, glucose is converted into

    • glycogen

    • pyruvic acid

    • starch

    • lactic acid

    Answer

    Which of the following is a transparent tissue?

    • Tendon

    • Fibrous cartilage

    • Hyaline cartilage

    • All of these

    Answer

    In rabbit, end of a long bone is connected in another by

    • tendon

    • ligaments

    • muscle

    • cartilage

    Answer
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    Spindle fibre is made up of

    • tubulin

    • humulin

    • intermediate filament

    • flagelin

    Answer

    Action potential is generated by

    • Na+

    • K+

    • Ca+

    • Cl-

    Answer

    Ligament is mainly made up of

    • reticulin

    • elastin

    • myosin

    • collagen

    Answer

    Sigmoid notch is formed by

    • cavity formed by humerus

    • cavity formed by radius-ulna

    • cavity formed by tibia-fibula

    • cavity formed by femur

    Answer
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    An acromian process is characteristically found in the

    • pelvic girdle of mammals

    • skull of frog

    • pectoral girdle of mammals

    • sperm of mammals

    Answer
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