Example of an auto- immune disease is

1.  Asthma

2.   Cancer

3.  Systemic lupus erythematosus

4.  Erythroblastosis foetalis

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4
Correct Answer :

Systemic lupus erythematosus


Explanation :
No Explanation available for this question

The condition in which a number of nuclei are present in a muscle fibres is called:

1.  Coenocytic

2.  Syncytial

3.  Polykaryon

4.  Endoduplication

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4
Correct Answer :

Syncytial


Explanation :
No Explanation available for this question

Contractile tissue have the following features : i.Mesodermal in origin ii.They contain stretch receptors iii.Rhythmic contractions are seen in them iv.Hey do not fatigue during the life of the animal Which of the above are characteristics of sphincters

1.  All the four

2.  Only (i), (ii) and (iii)

3.  Only (i), (ii) and (iv)

4.  Only (i), (iii) and (iv)

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4
Correct Answer :

Only (i), (ii) and (iii)


Explanation :
No Explanation available for this question

The lactic acid generated during muscle contraction is converted to glycogen in:

1.  Muscle

2.  Kidney

3.  Pancreas

4.  Liver

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4
Correct Answer :

Kidney


Explanation :
No Explanation available for this question

In heart cells, which one serves as a second messenger, speeding up muscle cell contraction in response to adrenaline

1.  cAMP

2.  cGMP

3.  GTP

4.  ATP

5.  AMP

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5
Correct Answer :

cAMP


Explanation :
No Explanation available for this question

The contractile protein of skeletal muscle involving ATPase activity is:

1.  Troponin

2.  α-action

3.  Tropomyosin

4.  Myosin

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4
Correct Answer :

Myosin


Explanation :
No Explanation available for this question

The globular protein molecule, which masks the active sites on the F-act in is:

1.  Troponin

2.  Myosin

3.  Tropomyosin

4.  Light meromyosin

5.  Heavy meromyosin

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5
Correct Answer :

Troponin


Explanation :
No Explanation available for this question

Statements: a. A-bands of the muscle is dark and contain myosin b. I-Bands are the light bands contain act in c. During muscle contraction the A-band contracts d. The part between the two Z-lines is called as sacromere e. The central part of thin filament, not overlapped by thick filament is called H-zone of the above statements

1.  a, c, e are correct while b and d are incorrect

2.  a, b, c and e are correct while d is incorrect

3.  a, b and c are correct while d and e are incorrect

4.  a, b and d are correct while c and e are incorrect

5.  a and b are correct while c, d and e are incorrect

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5
Correct Answer :

a, b and d are correct while c and e are incorrect


Explanation :
No Explanation available for this question

All or none law is not applicable to:

1.  Whole skeletal muscle

2.  Single skeletal muscle fibre

3.  Whole cardiac muscle

4.  Single smooth muscle fibre

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4
Correct Answer :

Whole skeletal muscle


Explanation :
No Explanation available for this question

The H- zone in the skeletal muscle fibre is due to:

1.  The central gap between myosin filaments in the A-band

2.  The central gap between act in filaments extending through myosin filaments in the A band

3.  Extension of myosin filaments in the central portion of the A-band

4.  The absence of myofibrils in the central portion of A-band

View Answer  
4
Correct Answer :

The central gap between act in filaments extending through myosin filaments in the A band


Explanation :
No Explanation available for this question
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