Q121.Which of the following muscles are not under the voluntary control of nervous system?
(1) Pharynx
(2) Wall of urinary bladder
(3) Anterior end of oesophagus
(4) Tongue
Ans.2
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Q122.During muscle contraction in a skeletal muscle fibre, Ca2+ combines with
(1) TpT
(2) TpC
(3) Tpl
(4) Tropomyosin
Ans.2
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Q123.The contraction of muscle of shortest duration is seen in
(1) Jaws
(2) Heart
(3) Eyelids
(4) Intestine
Ans.3
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Q124.In a contracted skeletal muscle fibre
(1) M line disappears
(2) H-zone elongates
(3) I-band remains constant
(4) A-band disappears
Ans.1
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Q125.Which one of the following ions is essential for muscular contraction?
(1) Na+, Ca++
(3) Mg+, K+
(2) Mg++, Ca++
(4) K+, Na+
Ans.2
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Q126.The potential difference across the membrane of a relaxed muscle fibre is called resting potential. In skeletal muscle fibre, it amounts to about
(1) -90 mV
(2) 50 mV
(3) 50-100 mV
(4) 100 mV
Ans.1
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Q127.Cori cycle involves
(1) Liver only
(2) Muscles only
(3) Both liver and muscles
(4) Bones
Ans.3
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Q128.Foramen magnum is associated with which bone?
(1). Frontal
(2) Parietal
(3) Temporal
(4) Occipital
Ans.4
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Q129.Tongue bone is
(1) Mandible
(2) Hyoid
(3) Flat bone
(4) Coccyx
Ans.2
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Q130.Number of anterior curves present with human vertebral column is
(1) 4
(2) 1
(3) 2
(4) 6
Ans.3
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