Q141.At rest when muscle is relaxed, the thin filaments interdigitate with the thick filaments only
(1) Outside A-band
(2) Outside H-band
(3) Inside I-band
(4) Inside M-line
Ans.4
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Q142.In which category of muscle fibres, can contraction be initiated by neurotransmitter acetylcholine
(1) Skeletal muscle fibre
(2) Cardiac muscle fibre
(3) Smooth muscle fibres
(4) All of these
Ans.4
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Q143.Anaerobic work becomes painful due to accumulation of
(1) Ca+2ions
(2) Myosin
(3) Lactic acid
(4) Creatine phosphate
Ans.3
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Q144.Contractile unit of muscle is part of myofibril between
(1) Z-line and I-band
(2) Z-line and Z-line
(3) Z-line and A-band
(4) A-band and I-band
Ans.2
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Q145Which bone is keystone of the cranial floor?
(1) Parietal
(2) Occipital
(3) Sphenoid
(4) Frontal
Ans.3
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Q146.Which is the only movable skull bone other than auditory ossicles?
(1) Maxillae
(2) Mandible
(3) Inferior nasal conchae
(4) Zygomatic
Ans.2
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Q147.Which is the best distinguishing feature of thoracic vertebrae?
(1) They have larger transverse process
(2) Their spinous process is directed posteriorly
(3) They articulate with the ribs
(4) Absence of vertebral transverse foramen
Ans.3
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Q148.Which part can be easily felt as high point of shoulder?
(1) Sterno-clavicle joint
(2) Acromian-clavicle joint
(3) Gleno-clavicle joint
(4) Superior angle of scapula
Ans.2
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Q149.Sella turcica, a depression enclosing the pituitary gland is found in
(1) Temporal bone
(2) Parietal bone
(3) Sphenoid bone
(4) Frontal bone
Ans.3
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Q150.When formed by the ossification of tendon is called
(1) Sesamoid
(2) Cartilage or replacing bone
(3) investing or dermal bone
(4) Membranous bone
Ans.1
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