Studied by 5 people
vertebral column
The ________ protects the spinal cord, supports the head and serves as the point of attachment for the ribs and musculature of the back.
Thoracic vertebrae
________, ribs and sternum together form the rib cage.
clavicle
Each ________ is a long slender bone with two curvatures.
Cilia
________ and flagella are the outgrowths of the cell membrane.
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.
Joints
________ are essential for all types of movements involving the bony parts of the body.
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.
facial region
The ________ is made up of 14 skeletal elements which form the front part of the skull.
Myofibril
________ has a striated appearance which is due to the distribution pattern of two important proteins- Actin and Myosin.
articulation surfaces
It has two ________ on its dorsal end and is hence called bicephalic.
Sternum
________ is a flat bone on the ventral midline of thorax.
Muscle
________ is a specialized tissue of mesodermal origin.
vertebra
Each ________ has a central hollow portion (neural canal) through which the spinal cord passes.
passage of ova
The ________ through the female reproductive tract is also facilitated by ciliary movement.
Cytoskeletal elements
________ like microfilaments are also involved in the amoeboid movement.
Bone
________ and cartilage are specialised connective tissues.
synovial cavity
They are characterised by the presence of a fluid filled ________ between the articulating surfaces of the two bones.
Pectoral
________ and Pelvic girdle bones help in the articulation of the upper and the lower limbs respectively with the axial skeleton.
Meromyosins
Many monomeric proteins called ________ constitute one thick filament.
pelvic girdle
The ________ consists of two coxal bones.
Locomotion
________ requires a perfectly coordinated activity of muscular, skeletal, and neural systems.
skull
The ________, vertebral column, sternum and ribs constitute the axial skeleton.
contractile property of muscles
The ________ is effectively used for locomotion and other movements by human beings and the majority of multicellular organisms.
ATP
The ________ is again hydrolysed by the myosin head and the cycle of cross- bridge formation and breakage is repeated causing further sliding.
limbs
The bones of the ________ along with their girdles constitute the appendicular skeleton.
rib
Each ________ is a thin flat bone connected dorsally to the vertebral column and ventrally to the sternum.
tiny bones
Each middle ear contains three ________- Malleus, Incus and Stapes, collectively called Ear Ossicles.
globular head
The ________ is an active ATPase enzyme and has binding sites for ATP and active sites for actin.
endoplasmic reticulum
The ________, i.e., the sarcoplasmic reticulum of the muscle fibres is the storehouse of calcium ions.
Myoglobin content
________ is high in some of the muscles which give a reddish appearance.
Auto immune disorder
________ affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle.
skeletal system
The ________ consists of a framework of bones and a few cartilages.
muscle fibre
A(n) ________ is a syncitium as the sarcoplasm contains many nuclei.
number of cervical vertebrae
The ________ is seven in almost all mammals including human beings.
Visceral muscles
________ are located in the inner walls of hollow visceral organs of the body like the alimentary canal, reproductive tract, etc.
successive ‘ Z lines
The portion of the myofibril between two ________ is considered the functional unit of contraction and is called a sarcomere.
thick filaments
Actin filaments are thinner as compared to myosin filaments, hence are commonly called thin and ________ respectively.
Note
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