238298
The contraction of the muscle continues in sliding filament theory
1 Till ATP binds to myosin head
2 Till ADP binds to myosin head
3 Till \(\mathrm{Ca}^{2+}\) is present in sarcoplasm
4 Till polymerization of myosin head is going on
Explanation:
Sliding of actin and myosin filaments continues till the \(\mathrm{Ca}^{2+}\) ions are pumped back in the Sarcoplasm, resulting in masking of actin filaments. This causes the return of z-line back to their original position, i.e., relaxation.
AIIMS-2017
Locomotion and Movement
238299
Myosin head separates from actin when ::
1 ATP hydrolysis
2 When ATP attached to myosin head
3 When ATP releases from myosin head
4 When ATP releases from Act in
Explanation:
The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide pass each other to generate movement. The myosin (thick) filaments of muscle fibres slide pass the actin (thin) filaments during muscle contraction, while the two groups of filaments remain at a relatively constant length. - Myosin has another binding site for ATP at which enzymatic activity hydrolyzes ATP to ADP, releasing an inorganic phosphate molecule and energy. - ATP binding causes myosin to release actin, allowing actin and myosin to de-attach from each other. Hence, myosin head separates from actin when ATP attached to myosin head.
AIIMS-26.05.2019 Shift-I
Locomotion and Movement
238300
When there is no change in muscle length during contraction, it is called:
1 isometric
2 isotonic
3 isostasis
4 refractory period
Explanation:
Exp. A Isometric contraction refers to a type of muscle contraction where there is no change in muscle length during contraction. In other words the muscle contracts but it does not cause any movements or changes in the length of the muscle. - During an isometric contraction, the tension generated by the muscle is equal to or greater than the opposing force applied to the muscle resulting in muscle stabilization rather that movement.
JCECE-2002
Locomotion and Movement
238301
Identify the correct order of stages in muscle contraction
1 Stimulus \(\rightarrow\) Release of acetyle choline \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Excitation of triad System \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Zmembranes brought closer
2 Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Z-membranes brought closer
3 Stimulus \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Release of \(\mathrm{Ca} 2+\) ions \(\rightarrow\) sliding of thin filaments \(\rightarrow\) formation of cross bridges \(\rightarrow Z\)-membranes brought closer
4 Stimulus \(\rightarrow\) Exition of triad system \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Release of acetylcholine \(\rightarrow\) formation of cross bridges \(\rightarrow\) Z- membranes brought closer \(\rightarrow\) sliding of thin filaments
Explanation:
The correct order of stages in muscle contraction is - Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow \mathrm{Z}\) membranes brought closer
238298
The contraction of the muscle continues in sliding filament theory
1 Till ATP binds to myosin head
2 Till ADP binds to myosin head
3 Till \(\mathrm{Ca}^{2+}\) is present in sarcoplasm
4 Till polymerization of myosin head is going on
Explanation:
Sliding of actin and myosin filaments continues till the \(\mathrm{Ca}^{2+}\) ions are pumped back in the Sarcoplasm, resulting in masking of actin filaments. This causes the return of z-line back to their original position, i.e., relaxation.
AIIMS-2017
Locomotion and Movement
238299
Myosin head separates from actin when ::
1 ATP hydrolysis
2 When ATP attached to myosin head
3 When ATP releases from myosin head
4 When ATP releases from Act in
Explanation:
The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide pass each other to generate movement. The myosin (thick) filaments of muscle fibres slide pass the actin (thin) filaments during muscle contraction, while the two groups of filaments remain at a relatively constant length. - Myosin has another binding site for ATP at which enzymatic activity hydrolyzes ATP to ADP, releasing an inorganic phosphate molecule and energy. - ATP binding causes myosin to release actin, allowing actin and myosin to de-attach from each other. Hence, myosin head separates from actin when ATP attached to myosin head.
AIIMS-26.05.2019 Shift-I
Locomotion and Movement
238300
When there is no change in muscle length during contraction, it is called:
1 isometric
2 isotonic
3 isostasis
4 refractory period
Explanation:
Exp. A Isometric contraction refers to a type of muscle contraction where there is no change in muscle length during contraction. In other words the muscle contracts but it does not cause any movements or changes in the length of the muscle. - During an isometric contraction, the tension generated by the muscle is equal to or greater than the opposing force applied to the muscle resulting in muscle stabilization rather that movement.
JCECE-2002
Locomotion and Movement
238301
Identify the correct order of stages in muscle contraction
1 Stimulus \(\rightarrow\) Release of acetyle choline \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Excitation of triad System \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Zmembranes brought closer
2 Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Z-membranes brought closer
3 Stimulus \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Release of \(\mathrm{Ca} 2+\) ions \(\rightarrow\) sliding of thin filaments \(\rightarrow\) formation of cross bridges \(\rightarrow Z\)-membranes brought closer
4 Stimulus \(\rightarrow\) Exition of triad system \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Release of acetylcholine \(\rightarrow\) formation of cross bridges \(\rightarrow\) Z- membranes brought closer \(\rightarrow\) sliding of thin filaments
Explanation:
The correct order of stages in muscle contraction is - Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow \mathrm{Z}\) membranes brought closer
238298
The contraction of the muscle continues in sliding filament theory
1 Till ATP binds to myosin head
2 Till ADP binds to myosin head
3 Till \(\mathrm{Ca}^{2+}\) is present in sarcoplasm
4 Till polymerization of myosin head is going on
Explanation:
Sliding of actin and myosin filaments continues till the \(\mathrm{Ca}^{2+}\) ions are pumped back in the Sarcoplasm, resulting in masking of actin filaments. This causes the return of z-line back to their original position, i.e., relaxation.
AIIMS-2017
Locomotion and Movement
238299
Myosin head separates from actin when ::
1 ATP hydrolysis
2 When ATP attached to myosin head
3 When ATP releases from myosin head
4 When ATP releases from Act in
Explanation:
The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide pass each other to generate movement. The myosin (thick) filaments of muscle fibres slide pass the actin (thin) filaments during muscle contraction, while the two groups of filaments remain at a relatively constant length. - Myosin has another binding site for ATP at which enzymatic activity hydrolyzes ATP to ADP, releasing an inorganic phosphate molecule and energy. - ATP binding causes myosin to release actin, allowing actin and myosin to de-attach from each other. Hence, myosin head separates from actin when ATP attached to myosin head.
AIIMS-26.05.2019 Shift-I
Locomotion and Movement
238300
When there is no change in muscle length during contraction, it is called:
1 isometric
2 isotonic
3 isostasis
4 refractory period
Explanation:
Exp. A Isometric contraction refers to a type of muscle contraction where there is no change in muscle length during contraction. In other words the muscle contracts but it does not cause any movements or changes in the length of the muscle. - During an isometric contraction, the tension generated by the muscle is equal to or greater than the opposing force applied to the muscle resulting in muscle stabilization rather that movement.
JCECE-2002
Locomotion and Movement
238301
Identify the correct order of stages in muscle contraction
1 Stimulus \(\rightarrow\) Release of acetyle choline \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Excitation of triad System \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Zmembranes brought closer
2 Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Z-membranes brought closer
3 Stimulus \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Release of \(\mathrm{Ca} 2+\) ions \(\rightarrow\) sliding of thin filaments \(\rightarrow\) formation of cross bridges \(\rightarrow Z\)-membranes brought closer
4 Stimulus \(\rightarrow\) Exition of triad system \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Release of acetylcholine \(\rightarrow\) formation of cross bridges \(\rightarrow\) Z- membranes brought closer \(\rightarrow\) sliding of thin filaments
Explanation:
The correct order of stages in muscle contraction is - Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow \mathrm{Z}\) membranes brought closer
238298
The contraction of the muscle continues in sliding filament theory
1 Till ATP binds to myosin head
2 Till ADP binds to myosin head
3 Till \(\mathrm{Ca}^{2+}\) is present in sarcoplasm
4 Till polymerization of myosin head is going on
Explanation:
Sliding of actin and myosin filaments continues till the \(\mathrm{Ca}^{2+}\) ions are pumped back in the Sarcoplasm, resulting in masking of actin filaments. This causes the return of z-line back to their original position, i.e., relaxation.
AIIMS-2017
Locomotion and Movement
238299
Myosin head separates from actin when ::
1 ATP hydrolysis
2 When ATP attached to myosin head
3 When ATP releases from myosin head
4 When ATP releases from Act in
Explanation:
The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide pass each other to generate movement. The myosin (thick) filaments of muscle fibres slide pass the actin (thin) filaments during muscle contraction, while the two groups of filaments remain at a relatively constant length. - Myosin has another binding site for ATP at which enzymatic activity hydrolyzes ATP to ADP, releasing an inorganic phosphate molecule and energy. - ATP binding causes myosin to release actin, allowing actin and myosin to de-attach from each other. Hence, myosin head separates from actin when ATP attached to myosin head.
AIIMS-26.05.2019 Shift-I
Locomotion and Movement
238300
When there is no change in muscle length during contraction, it is called:
1 isometric
2 isotonic
3 isostasis
4 refractory period
Explanation:
Exp. A Isometric contraction refers to a type of muscle contraction where there is no change in muscle length during contraction. In other words the muscle contracts but it does not cause any movements or changes in the length of the muscle. - During an isometric contraction, the tension generated by the muscle is equal to or greater than the opposing force applied to the muscle resulting in muscle stabilization rather that movement.
JCECE-2002
Locomotion and Movement
238301
Identify the correct order of stages in muscle contraction
1 Stimulus \(\rightarrow\) Release of acetyle choline \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Excitation of triad System \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Zmembranes brought closer
2 Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow\) Z-membranes brought closer
3 Stimulus \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Release of \(\mathrm{Ca} 2+\) ions \(\rightarrow\) sliding of thin filaments \(\rightarrow\) formation of cross bridges \(\rightarrow Z\)-membranes brought closer
4 Stimulus \(\rightarrow\) Exition of triad system \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) Release of acetylcholine \(\rightarrow\) formation of cross bridges \(\rightarrow\) Z- membranes brought closer \(\rightarrow\) sliding of thin filaments
Explanation:
The correct order of stages in muscle contraction is - Stimulus \(\rightarrow\) Release of acetylcholine \(\rightarrow\) Excitation of triad System \(\rightarrow\) Release of \(\mathrm{Ca}^{2+}\) ions \(\rightarrow\) formation of cross bridges \(\rightarrow\) sliding of thin filaments \(\rightarrow \mathrm{Z}\) membranes brought closer
