The ________ protects the spinal cord, supports the head and serves as the point of attachment for the ribs and musculature of the back.
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Thoracic vertebrae
________, ribs and sternum together form the rib cage.
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clavicle
Each ________ is a long slender bone with two curvatures.
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Cilia
________ and flagella are the outgrowths of the cell membrane.
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Flagellar movement
________ helps in the swimming of spermatozoa, maintenance of water current in the canal system of sponges, and in the locomotion of Protozoans like Euglena.
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Joints
________ are essential for all types of movements involving the bony parts of the body.
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regular distance
The head and short arm projects outwards at a(n) ________ and angle from each other from the surface of a polymerised myosin filament and is known as a cross arm.
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facial region
The ________ is made up of 14 skeletal elements which form the front part of the skull.
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Myofibril
________ has a striated appearance which is due to the distribution pattern of two important proteins- Actin and Myosin.
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articulation surfaces
It has two ________ on its dorsal end and is hence called bicephalic.
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Sternum
________ is a flat bone on the ventral midline of thorax.
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Muscle
________ is a specialized tissue of mesodermal origin.
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vertebra
Each ________ has a central hollow portion (neural canal) through which the spinal cord passes.
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passage of ova
The ________ through the female reproductive tract is also facilitated by ciliary movement.
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Cytoskeletal elements
________ like microfilaments are also involved in the amoeboid movement.
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Bone
________ and cartilage are specialised connective tissues.
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synovial cavity
They are characterised by the presence of a fluid filled ________ between the articulating surfaces of the two bones.
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Pectoral
________ and Pelvic girdle bones help in the articulation of the upper and the lower limbs respectively with the axial skeleton.
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Meromyosins
Many monomeric proteins called ________ constitute one thick filament.
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pelvic girdle
The ________ consists of two coxal bones.
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Locomotion
________ requires a perfectly coordinated activity of muscular, skeletal, and neural systems.
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skull
The ________, vertebral column, sternum and ribs constitute the axial skeleton.
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contractile property of muscles
The ________ is effectively used for locomotion and other movements by human beings and the majority of multicellular organisms.
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ATP
The ________ is again hydrolysed by the myosin head and the cycle of cross- bridge formation and breakage is repeated causing further sliding.
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limbs
The bones of the ________ along with their girdles constitute the appendicular skeleton.
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rib
Each ________ is a thin flat bone connected dorsally to the vertebral column and ventrally to the sternum.
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tiny bones
Each middle ear contains three ________- Malleus, Incus and Stapes, collectively called Ear Ossicles.
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globular head
The ________ is an active ATPase enzyme and has binding sites for ATP and active sites for actin.
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endoplasmic reticulum
The ________, i.e., the sarcoplasmic reticulum of the muscle fibres is the storehouse of calcium ions.
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Myoglobin content
________ is high in some of the muscles which give a reddish appearance.
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Auto immune disorder
________ affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle.
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skeletal system
The ________ consists of a framework of bones and a few cartilages.
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muscle fibre
A(n) ________ is a syncitium as the sarcoplasm contains many nuclei.
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number of cervical vertebrae
The ________ is seven in almost all mammals including human beings.
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Visceral muscles
________ are located in the inner walls of hollow visceral organs of the body like the alimentary canal, reproductive tract, etc.
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successive ‘ Z lines
The portion of the myofibril between two ________ is considered the functional unit of contraction and is called a sarcomere.
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thick filaments
Actin filaments are thinner as compared to myosin filaments, hence are commonly called thin and ________ respectively.
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Flashcard (27)