340068
Which of the following leads to muscle relaxation?
1 Hydrolysis of ATP to ADP
2 Release of calcium from ER
3 Release of calcium from troponin
4 Formation of cross-linkages between actin and myosin
Explanation:
Release of calcium from troponin leads to muscle relaxation.
BIOXI20: LOCOMOTION AND MOVEMENT
340052
Assertion : The extensor muscles of the human back remain in sustained contraction to maintain erect posture. Reason : The extensor muscle are rich in red muscle fibres with abundant mitochondria and myoglobin.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The extensor muscles of the human back are bulky red in colour due to high amounts of myoglobin and mitochondria. They are called as red muscles. They can remain in sustained contraction to maintain erect posture against gravity due to high amounts of myoglobin. \(\mathrm{O}_{2}\) is present in abundant levels in myoglobin. So in case of \(\mathrm{O}_{2}\) deficiency these oxygen molecules are released into cytoplasm of the muscle and help the muscles to be sustained contraction by supplying energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340053
During muscle contraction
1 Chemical energy is changed to electrical energy
2 Mechanical energy is changed to chemical energy
3 Mechanical energy is changed to electrical energy
4 Chemical energy is changed to physical energy
Explanation:
ATP is the immediate source of chemical energy for muscle contraction. Here chemical energy is converted into physical energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340054
Statement A : Amount of myoglobin is high in red muscle fibres Statement B : Pseudopodial movements as in Amoeba are shown by cytoskeletal elements like microfilaments
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
340068
Which of the following leads to muscle relaxation?
1 Hydrolysis of ATP to ADP
2 Release of calcium from ER
3 Release of calcium from troponin
4 Formation of cross-linkages between actin and myosin
Explanation:
Release of calcium from troponin leads to muscle relaxation.
BIOXI20: LOCOMOTION AND MOVEMENT
340052
Assertion : The extensor muscles of the human back remain in sustained contraction to maintain erect posture. Reason : The extensor muscle are rich in red muscle fibres with abundant mitochondria and myoglobin.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The extensor muscles of the human back are bulky red in colour due to high amounts of myoglobin and mitochondria. They are called as red muscles. They can remain in sustained contraction to maintain erect posture against gravity due to high amounts of myoglobin. \(\mathrm{O}_{2}\) is present in abundant levels in myoglobin. So in case of \(\mathrm{O}_{2}\) deficiency these oxygen molecules are released into cytoplasm of the muscle and help the muscles to be sustained contraction by supplying energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340053
During muscle contraction
1 Chemical energy is changed to electrical energy
2 Mechanical energy is changed to chemical energy
3 Mechanical energy is changed to electrical energy
4 Chemical energy is changed to physical energy
Explanation:
ATP is the immediate source of chemical energy for muscle contraction. Here chemical energy is converted into physical energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340054
Statement A : Amount of myoglobin is high in red muscle fibres Statement B : Pseudopodial movements as in Amoeba are shown by cytoskeletal elements like microfilaments
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
340068
Which of the following leads to muscle relaxation?
1 Hydrolysis of ATP to ADP
2 Release of calcium from ER
3 Release of calcium from troponin
4 Formation of cross-linkages between actin and myosin
Explanation:
Release of calcium from troponin leads to muscle relaxation.
BIOXI20: LOCOMOTION AND MOVEMENT
340052
Assertion : The extensor muscles of the human back remain in sustained contraction to maintain erect posture. Reason : The extensor muscle are rich in red muscle fibres with abundant mitochondria and myoglobin.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The extensor muscles of the human back are bulky red in colour due to high amounts of myoglobin and mitochondria. They are called as red muscles. They can remain in sustained contraction to maintain erect posture against gravity due to high amounts of myoglobin. \(\mathrm{O}_{2}\) is present in abundant levels in myoglobin. So in case of \(\mathrm{O}_{2}\) deficiency these oxygen molecules are released into cytoplasm of the muscle and help the muscles to be sustained contraction by supplying energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340053
During muscle contraction
1 Chemical energy is changed to electrical energy
2 Mechanical energy is changed to chemical energy
3 Mechanical energy is changed to electrical energy
4 Chemical energy is changed to physical energy
Explanation:
ATP is the immediate source of chemical energy for muscle contraction. Here chemical energy is converted into physical energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340054
Statement A : Amount of myoglobin is high in red muscle fibres Statement B : Pseudopodial movements as in Amoeba are shown by cytoskeletal elements like microfilaments
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
340068
Which of the following leads to muscle relaxation?
1 Hydrolysis of ATP to ADP
2 Release of calcium from ER
3 Release of calcium from troponin
4 Formation of cross-linkages between actin and myosin
Explanation:
Release of calcium from troponin leads to muscle relaxation.
BIOXI20: LOCOMOTION AND MOVEMENT
340052
Assertion : The extensor muscles of the human back remain in sustained contraction to maintain erect posture. Reason : The extensor muscle are rich in red muscle fibres with abundant mitochondria and myoglobin.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
The extensor muscles of the human back are bulky red in colour due to high amounts of myoglobin and mitochondria. They are called as red muscles. They can remain in sustained contraction to maintain erect posture against gravity due to high amounts of myoglobin. \(\mathrm{O}_{2}\) is present in abundant levels in myoglobin. So in case of \(\mathrm{O}_{2}\) deficiency these oxygen molecules are released into cytoplasm of the muscle and help the muscles to be sustained contraction by supplying energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340053
During muscle contraction
1 Chemical energy is changed to electrical energy
2 Mechanical energy is changed to chemical energy
3 Mechanical energy is changed to electrical energy
4 Chemical energy is changed to physical energy
Explanation:
ATP is the immediate source of chemical energy for muscle contraction. Here chemical energy is converted into physical energy.
BIOXI20: LOCOMOTION AND MOVEMENT
340054
Statement A : Amount of myoglobin is high in red muscle fibres Statement B : Pseudopodial movements as in Amoeba are shown by cytoskeletal elements like microfilaments
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
