339999
In which of the following step of muscle contraction energy is utilized in the form of ATP?
1 Release of calcium ion into the sarcoplasm
2 Formation of cross bridge
3 Breaking of cross bridge
4 Both (2) and (3)
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head now binds to the exposed active sites on actin to from a cross bridge.
BIOXI20: LOCOMOTION AND MOVEMENT
340000
Which statement about the structure of the skeletal muscle is true?
1 Light bands of the sarcomere are the regions where actin and myosin filaments overlap
2 When a muscle contracts, the A bands of the sarcomere shorten
3 When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten
4 The sarcoplasm of the muscle cell is contained within the sarcoplasmic reticulum
Explanation:
When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten.
BIOXI20: LOCOMOTION AND MOVEMENT
340001
Statement A : Acetylcholine is released when the neural signal reaches to the motor end-plate. Statement B : During muscle contraction, isotropic bands get elongated.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, isotropic band gets shortened.
BIOXI20: LOCOMOTION AND MOVEMENT
340002
Which of the following brings about the relaxation of a muscle fibre?
1 Unmasking of active sites
2 Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae
3 Sliding of the thin filaments towards \(\mathrm{M}\) line
4 Binding of \(\mathrm{Ca}^{2+}\) to troponin
Explanation:
Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae results in the masking of active sites on actin filaments. This causes the return of thin filaments back to their original position leading to muscle relaxation.
NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOXI20: LOCOMOTION AND MOVEMENT
339999
In which of the following step of muscle contraction energy is utilized in the form of ATP?
1 Release of calcium ion into the sarcoplasm
2 Formation of cross bridge
3 Breaking of cross bridge
4 Both (2) and (3)
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head now binds to the exposed active sites on actin to from a cross bridge.
BIOXI20: LOCOMOTION AND MOVEMENT
340000
Which statement about the structure of the skeletal muscle is true?
1 Light bands of the sarcomere are the regions where actin and myosin filaments overlap
2 When a muscle contracts, the A bands of the sarcomere shorten
3 When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten
4 The sarcoplasm of the muscle cell is contained within the sarcoplasmic reticulum
Explanation:
When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten.
BIOXI20: LOCOMOTION AND MOVEMENT
340001
Statement A : Acetylcholine is released when the neural signal reaches to the motor end-plate. Statement B : During muscle contraction, isotropic bands get elongated.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, isotropic band gets shortened.
BIOXI20: LOCOMOTION AND MOVEMENT
340002
Which of the following brings about the relaxation of a muscle fibre?
1 Unmasking of active sites
2 Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae
3 Sliding of the thin filaments towards \(\mathrm{M}\) line
4 Binding of \(\mathrm{Ca}^{2+}\) to troponin
Explanation:
Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae results in the masking of active sites on actin filaments. This causes the return of thin filaments back to their original position leading to muscle relaxation.
339999
In which of the following step of muscle contraction energy is utilized in the form of ATP?
1 Release of calcium ion into the sarcoplasm
2 Formation of cross bridge
3 Breaking of cross bridge
4 Both (2) and (3)
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head now binds to the exposed active sites on actin to from a cross bridge.
BIOXI20: LOCOMOTION AND MOVEMENT
340000
Which statement about the structure of the skeletal muscle is true?
1 Light bands of the sarcomere are the regions where actin and myosin filaments overlap
2 When a muscle contracts, the A bands of the sarcomere shorten
3 When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten
4 The sarcoplasm of the muscle cell is contained within the sarcoplasmic reticulum
Explanation:
When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten.
BIOXI20: LOCOMOTION AND MOVEMENT
340001
Statement A : Acetylcholine is released when the neural signal reaches to the motor end-plate. Statement B : During muscle contraction, isotropic bands get elongated.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, isotropic band gets shortened.
BIOXI20: LOCOMOTION AND MOVEMENT
340002
Which of the following brings about the relaxation of a muscle fibre?
1 Unmasking of active sites
2 Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae
3 Sliding of the thin filaments towards \(\mathrm{M}\) line
4 Binding of \(\mathrm{Ca}^{2+}\) to troponin
Explanation:
Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae results in the masking of active sites on actin filaments. This causes the return of thin filaments back to their original position leading to muscle relaxation.
339999
In which of the following step of muscle contraction energy is utilized in the form of ATP?
1 Release of calcium ion into the sarcoplasm
2 Formation of cross bridge
3 Breaking of cross bridge
4 Both (2) and (3)
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head now binds to the exposed active sites on actin to from a cross bridge.
BIOXI20: LOCOMOTION AND MOVEMENT
340000
Which statement about the structure of the skeletal muscle is true?
1 Light bands of the sarcomere are the regions where actin and myosin filaments overlap
2 When a muscle contracts, the A bands of the sarcomere shorten
3 When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten
4 The sarcoplasm of the muscle cell is contained within the sarcoplasmic reticulum
Explanation:
When a muscle contracts, the \(\mathrm{H}\) bands of the sarcomere shorten.
BIOXI20: LOCOMOTION AND MOVEMENT
340001
Statement A : Acetylcholine is released when the neural signal reaches to the motor end-plate. Statement B : During muscle contraction, isotropic bands get elongated.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, isotropic band gets shortened.
BIOXI20: LOCOMOTION AND MOVEMENT
340002
Which of the following brings about the relaxation of a muscle fibre?
1 Unmasking of active sites
2 Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae
3 Sliding of the thin filaments towards \(\mathrm{M}\) line
4 Binding of \(\mathrm{Ca}^{2+}\) to troponin
Explanation:
Pumping of \(\mathrm{Ca}^{2+}\) into sarcoplasmic cisternae results in the masking of active sites on actin filaments. This causes the return of thin filaments back to their original position leading to muscle relaxation.
