Statement-I :- During muscle contraction thin filaments slide over thick filaments.Statement-II :- During muscle contraction the 'I' bands get reduced, whereas the 'A' bands retain the length.In the light of the above statements, choose the most appropriate answer from the options given below :-Both Statement I and Statement II are incorrect.Statement I is correct but Statement II is incorrect.Statement I is incorrect but Statement II is correctBoth Statement I and Statement II are correct.

Check all of the terms below that will correctly complete this statement. During a muscle fiber contraction, the _________ decreases in size.  Check All That ApplyA bandA bandentire sarcomereentire sarcomereH zoneH zoneI bandI band

Which of the following statements is INCORRECT about "intrafusal muscle fibres" in any given muscle?Group of answer choicesthey make up a small proportion of the total mass of contractile muscle fibresthey are located within muscle spindlesthey are activated by alpha motor neuronsduring voluntary muscle activity they often contract in parallel with extrafusal muscle fibresthey extend the range of stretch-sensitivity of muscle spindles PreviousNext

What happens to the actin and myosin filaments when a muscle contracts?Multiple ChoiceBoth of them shorten.Both of them lengthen.Both stay the same length.Actin shortens, while myosin lengthens.Myosin shortens, while actin lengthens.

Complete the sentences by choosing the correct word from each dropdown menu.In resting muscle fiber, a is normally 2.0 to 2.5 micrometers long.This is the optimum length for producing maximum when the muscle contracts.If a muscle fiber is overly contracted, the filaments but against the Z discs.Conversely, if the muscle fiber is overly stretched, there is not enough overlap between the thick and myofilaments.Therefore, if the thick and thin filaments do not overlap, very few are formed.

Statement I: Area under velocity-time graph gives the distance travelled by the body in a given time.Statement II: Area under acceleration-time graph is equal to the change in velocity in the given time.In the light of given statements, choose the correct answer from the options given below.JEE Main 2023 (08 Apr Shift 2)ABoth Statement I and Statement II are trueBBoth Statement I and Statement II are falseCStatement I is correct but Statement II is falseDStatement I is incorrect but Statement II is true