340055
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
1 Tetanus
2 Tonus
3 Spasm
4 Fatigue
Explanation:
Tetanus is continous state of contraction of a muscle resulting from summation of series of rapid muscular contractions that are induced by repeated stimulation of muscle.
NEET - 2016
BIOXI20: LOCOMOTION AND MOVEMENT
340056
Match the columns I and II. Column I Column II A Fatigue P Sarcoplasmic reticulum is high B Red fibres Q Anaerobic breakdown of glycogen C White fibres R Plenty of mitochondria
1 A-R, B-P , C-Q
2 A-Q, B-R, C-P
3 A-P, B-R, C-Q
4 A-Q, B-P, C-R
Explanation:
Fatigue - Anaerobic breakdown of glycogen Red fibres - Plenty of mitochondria White fibres - Sarcoplasmic reticulum is high.
BIOXI20: LOCOMOTION AND MOVEMENT
340057
Statement A : White muscle fibres possess low amount of sarcoplasmic reticulum Statement B : All the cardiac muscles are unbranched, striated and involuntary in nature
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:
White muscle fibres possess high amount of sarcoplasmic reticulum. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activities directly.
BIOXI20: LOCOMOTION AND MOVEMENT
340058
Arrange the following events of contraction cycle in the sequential order of their occurrence, as per sliding filament theory i. Formation of cross bridge ii. Sliding of thin filaments iii. ATP hydrolysis iv. Release of ADP from myosin Options:
1 iii, i, iv, ii
2 i, iii, ii, iv
3 iii, ii, i, iv
4 iii, i, ii, iv
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head binds to the exposed active sites on actin to form a cross bridge. The cross bridge pulls the attached actin filaments towards the centre of ' \(A\) ' band causing a shortening of the sarcomere (contraction). The myosin, releasing the ADP and Pi goes back to its relaxed state. A new ATP binds and the cross-bridge is broken. The ATP is again hydrolysed by the myosin head and the cycle repeats.
340055
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
1 Tetanus
2 Tonus
3 Spasm
4 Fatigue
Explanation:
Tetanus is continous state of contraction of a muscle resulting from summation of series of rapid muscular contractions that are induced by repeated stimulation of muscle.
NEET - 2016
BIOXI20: LOCOMOTION AND MOVEMENT
340056
Match the columns I and II. Column I Column II A Fatigue P Sarcoplasmic reticulum is high B Red fibres Q Anaerobic breakdown of glycogen C White fibres R Plenty of mitochondria
1 A-R, B-P , C-Q
2 A-Q, B-R, C-P
3 A-P, B-R, C-Q
4 A-Q, B-P, C-R
Explanation:
Fatigue - Anaerobic breakdown of glycogen Red fibres - Plenty of mitochondria White fibres - Sarcoplasmic reticulum is high.
BIOXI20: LOCOMOTION AND MOVEMENT
340057
Statement A : White muscle fibres possess low amount of sarcoplasmic reticulum Statement B : All the cardiac muscles are unbranched, striated and involuntary in nature
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:
White muscle fibres possess high amount of sarcoplasmic reticulum. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activities directly.
BIOXI20: LOCOMOTION AND MOVEMENT
340058
Arrange the following events of contraction cycle in the sequential order of their occurrence, as per sliding filament theory i. Formation of cross bridge ii. Sliding of thin filaments iii. ATP hydrolysis iv. Release of ADP from myosin Options:
1 iii, i, iv, ii
2 i, iii, ii, iv
3 iii, ii, i, iv
4 iii, i, ii, iv
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head binds to the exposed active sites on actin to form a cross bridge. The cross bridge pulls the attached actin filaments towards the centre of ' \(A\) ' band causing a shortening of the sarcomere (contraction). The myosin, releasing the ADP and Pi goes back to its relaxed state. A new ATP binds and the cross-bridge is broken. The ATP is again hydrolysed by the myosin head and the cycle repeats.
340055
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
1 Tetanus
2 Tonus
3 Spasm
4 Fatigue
Explanation:
Tetanus is continous state of contraction of a muscle resulting from summation of series of rapid muscular contractions that are induced by repeated stimulation of muscle.
NEET - 2016
BIOXI20: LOCOMOTION AND MOVEMENT
340056
Match the columns I and II. Column I Column II A Fatigue P Sarcoplasmic reticulum is high B Red fibres Q Anaerobic breakdown of glycogen C White fibres R Plenty of mitochondria
1 A-R, B-P , C-Q
2 A-Q, B-R, C-P
3 A-P, B-R, C-Q
4 A-Q, B-P, C-R
Explanation:
Fatigue - Anaerobic breakdown of glycogen Red fibres - Plenty of mitochondria White fibres - Sarcoplasmic reticulum is high.
BIOXI20: LOCOMOTION AND MOVEMENT
340057
Statement A : White muscle fibres possess low amount of sarcoplasmic reticulum Statement B : All the cardiac muscles are unbranched, striated and involuntary in nature
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:
White muscle fibres possess high amount of sarcoplasmic reticulum. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activities directly.
BIOXI20: LOCOMOTION AND MOVEMENT
340058
Arrange the following events of contraction cycle in the sequential order of their occurrence, as per sliding filament theory i. Formation of cross bridge ii. Sliding of thin filaments iii. ATP hydrolysis iv. Release of ADP from myosin Options:
1 iii, i, iv, ii
2 i, iii, ii, iv
3 iii, ii, i, iv
4 iii, i, ii, iv
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head binds to the exposed active sites on actin to form a cross bridge. The cross bridge pulls the attached actin filaments towards the centre of ' \(A\) ' band causing a shortening of the sarcomere (contraction). The myosin, releasing the ADP and Pi goes back to its relaxed state. A new ATP binds and the cross-bridge is broken. The ATP is again hydrolysed by the myosin head and the cycle repeats.
340055
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
1 Tetanus
2 Tonus
3 Spasm
4 Fatigue
Explanation:
Tetanus is continous state of contraction of a muscle resulting from summation of series of rapid muscular contractions that are induced by repeated stimulation of muscle.
NEET - 2016
BIOXI20: LOCOMOTION AND MOVEMENT
340056
Match the columns I and II. Column I Column II A Fatigue P Sarcoplasmic reticulum is high B Red fibres Q Anaerobic breakdown of glycogen C White fibres R Plenty of mitochondria
1 A-R, B-P , C-Q
2 A-Q, B-R, C-P
3 A-P, B-R, C-Q
4 A-Q, B-P, C-R
Explanation:
Fatigue - Anaerobic breakdown of glycogen Red fibres - Plenty of mitochondria White fibres - Sarcoplasmic reticulum is high.
BIOXI20: LOCOMOTION AND MOVEMENT
340057
Statement A : White muscle fibres possess low amount of sarcoplasmic reticulum Statement B : All the cardiac muscles are unbranched, striated and involuntary in nature
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:
White muscle fibres possess high amount of sarcoplasmic reticulum. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activities directly.
BIOXI20: LOCOMOTION AND MOVEMENT
340058
Arrange the following events of contraction cycle in the sequential order of their occurrence, as per sliding filament theory i. Formation of cross bridge ii. Sliding of thin filaments iii. ATP hydrolysis iv. Release of ADP from myosin Options:
1 iii, i, iv, ii
2 i, iii, ii, iv
3 iii, ii, i, iv
4 iii, i, ii, iv
Explanation:
Utilising the energy from ATP hydrolysis, the myosin head binds to the exposed active sites on actin to form a cross bridge. The cross bridge pulls the attached actin filaments towards the centre of ' \(A\) ' band causing a shortening of the sarcomere (contraction). The myosin, releasing the ADP and Pi goes back to its relaxed state. A new ATP binds and the cross-bridge is broken. The ATP is again hydrolysed by the myosin head and the cycle repeats.
