Mechanism of Muscle Contraction
« Previous Topic: Joints Next Topic: Structure of Contractile Proteins »
BIOXI20: LOCOMOTION AND MOVEMENT

340048 Which of the following actions is most likely to terminate an ongoing contraction of a skeletal muscle fibre?

1 Release of neurotransmitter at the neuromuscular junction
2 Increase in \(\mathrm{Ca}^{2+}\) concentration in sarcoplasm
3 Influx of \(\mathrm{Ca}^{2+}\) into the axon terminal at the neuromuscular junction
4 Removal of \(\mathrm{Ca}^{2+}\) from sarcoplasm
BIOXI20: LOCOMOTION AND MOVEMENT

340049 i. Number of mitochondria less.
ii. Number of mitochondria more
iii. Sarcoplasmic reticulum is abundant
iv. Myoglobin content high
v. Sarcoplasmic reticulum moderate
vi. Aerobic muscles
vii. Depend on anaerobic respiration for energy.
viii. Less myoglobin content
A. Red muscles  B. White muscles
Identify above (i to viii) traits as characteristic of \(A\) and \(B\) types of muscles

1 A-i, iii, vii, viii; B-ii, iv, v, vi
2 A-i, iii, iv, vii; B-ii, v, vi, viii
3 A-ii, iv, v, vi B-i, iii,vii, viii
4 A-ii, v, vi, viii; B-i, iii, iv, vii
BIOXI20: LOCOMOTION AND MOVEMENT

340050 Put the following phrases in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction.
i. Receptor sites on sarcolemma
ii. Nerve impulses.
iii. Release of \(\mathrm{Ca}^{2+}\) from sarcoplasmic reticulum
iv. The neurotransmitter acetylcholine is released
v. Sarcomere shortern
vi. Synaptic cleft
vii. Spread of impulses over sarcolemma on T-tubules

1 ii, iv, i, vi, vii, iii, v
2 i, ii, iii, iv, v, vi, vii
3 ii, iv, vi, i, vii, iii, v
4 vii, vi, v, iv, iii, ii, i
BIOXI20: LOCOMOTION AND MOVEMENT

340051 Read the following events occurred during muscle contraction, arrange them in correct sequence and select the correct option given below
i. Hydrolysis of ATP and formation of cross bridge
ii. During power stroke, thin filaments moves towards the centre of A band
iii. Release of Acetylcholine
iv. Generation of action potential in sarcolemma
v. Release of \(\mathrm{Ca}^{+2}\) from sarcoplasmic reticulum, increases sarcoplasmic \(\mathrm{Ca}^{+2}\) level
vi. Binding of \(\mathrm{Ca}^{+2}\) with troponin and masking activities removed

1 ii \(-\mathrm{i}-\mathrm{iii}-\mathrm{iv}-\mathrm{v}-\mathrm{vi}\)
2 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{ii}-\mathrm{i}\)
3 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{i}-\mathrm{ii}\)
4 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{i}-\mathrm{ii}-\mathrm{vi}\)
BIOXI20: LOCOMOTION AND MOVEMENT

340067 During muscle contraction

1 Size of sarcomere becomes smaller
2 Size of A- band increases
3 Size of I -band decreases
4 All the above
Join With Us for More Updates
BIOXI20: LOCOMOTION AND MOVEMENT

340048 Which of the following actions is most likely to terminate an ongoing contraction of a skeletal muscle fibre?

1 Release of neurotransmitter at the neuromuscular junction
2 Increase in \(\mathrm{Ca}^{2+}\) concentration in sarcoplasm
3 Influx of \(\mathrm{Ca}^{2+}\) into the axon terminal at the neuromuscular junction
4 Removal of \(\mathrm{Ca}^{2+}\) from sarcoplasm
BIOXI20: LOCOMOTION AND MOVEMENT

340049 i. Number of mitochondria less.
ii. Number of mitochondria more
iii. Sarcoplasmic reticulum is abundant
iv. Myoglobin content high
v. Sarcoplasmic reticulum moderate
vi. Aerobic muscles
vii. Depend on anaerobic respiration for energy.
viii. Less myoglobin content
A. Red muscles  B. White muscles
Identify above (i to viii) traits as characteristic of \(A\) and \(B\) types of muscles

1 A-i, iii, vii, viii; B-ii, iv, v, vi
2 A-i, iii, iv, vii; B-ii, v, vi, viii
3 A-ii, iv, v, vi B-i, iii,vii, viii
4 A-ii, v, vi, viii; B-i, iii, iv, vii
BIOXI20: LOCOMOTION AND MOVEMENT

340050 Put the following phrases in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction.
i. Receptor sites on sarcolemma
ii. Nerve impulses.
iii. Release of \(\mathrm{Ca}^{2+}\) from sarcoplasmic reticulum
iv. The neurotransmitter acetylcholine is released
v. Sarcomere shortern
vi. Synaptic cleft
vii. Spread of impulses over sarcolemma on T-tubules

1 ii, iv, i, vi, vii, iii, v
2 i, ii, iii, iv, v, vi, vii
3 ii, iv, vi, i, vii, iii, v
4 vii, vi, v, iv, iii, ii, i
BIOXI20: LOCOMOTION AND MOVEMENT

340051 Read the following events occurred during muscle contraction, arrange them in correct sequence and select the correct option given below
i. Hydrolysis of ATP and formation of cross bridge
ii. During power stroke, thin filaments moves towards the centre of A band
iii. Release of Acetylcholine
iv. Generation of action potential in sarcolemma
v. Release of \(\mathrm{Ca}^{+2}\) from sarcoplasmic reticulum, increases sarcoplasmic \(\mathrm{Ca}^{+2}\) level
vi. Binding of \(\mathrm{Ca}^{+2}\) with troponin and masking activities removed

1 ii \(-\mathrm{i}-\mathrm{iii}-\mathrm{iv}-\mathrm{v}-\mathrm{vi}\)
2 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{ii}-\mathrm{i}\)
3 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{i}-\mathrm{ii}\)
4 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{i}-\mathrm{ii}-\mathrm{vi}\)
BIOXI20: LOCOMOTION AND MOVEMENT

340067 During muscle contraction

1 Size of sarcomere becomes smaller
2 Size of A- band increases
3 Size of I -band decreases
4 All the above
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
BIOXI20: LOCOMOTION AND MOVEMENT

340048 Which of the following actions is most likely to terminate an ongoing contraction of a skeletal muscle fibre?

1 Release of neurotransmitter at the neuromuscular junction
2 Increase in \(\mathrm{Ca}^{2+}\) concentration in sarcoplasm
3 Influx of \(\mathrm{Ca}^{2+}\) into the axon terminal at the neuromuscular junction
4 Removal of \(\mathrm{Ca}^{2+}\) from sarcoplasm
BIOXI20: LOCOMOTION AND MOVEMENT

340049 i. Number of mitochondria less.
ii. Number of mitochondria more
iii. Sarcoplasmic reticulum is abundant
iv. Myoglobin content high
v. Sarcoplasmic reticulum moderate
vi. Aerobic muscles
vii. Depend on anaerobic respiration for energy.
viii. Less myoglobin content
A. Red muscles  B. White muscles
Identify above (i to viii) traits as characteristic of \(A\) and \(B\) types of muscles

1 A-i, iii, vii, viii; B-ii, iv, v, vi
2 A-i, iii, iv, vii; B-ii, v, vi, viii
3 A-ii, iv, v, vi B-i, iii,vii, viii
4 A-ii, v, vi, viii; B-i, iii, iv, vii
BIOXI20: LOCOMOTION AND MOVEMENT

340050 Put the following phrases in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction.
i. Receptor sites on sarcolemma
ii. Nerve impulses.
iii. Release of \(\mathrm{Ca}^{2+}\) from sarcoplasmic reticulum
iv. The neurotransmitter acetylcholine is released
v. Sarcomere shortern
vi. Synaptic cleft
vii. Spread of impulses over sarcolemma on T-tubules

1 ii, iv, i, vi, vii, iii, v
2 i, ii, iii, iv, v, vi, vii
3 ii, iv, vi, i, vii, iii, v
4 vii, vi, v, iv, iii, ii, i
BIOXI20: LOCOMOTION AND MOVEMENT

340051 Read the following events occurred during muscle contraction, arrange them in correct sequence and select the correct option given below
i. Hydrolysis of ATP and formation of cross bridge
ii. During power stroke, thin filaments moves towards the centre of A band
iii. Release of Acetylcholine
iv. Generation of action potential in sarcolemma
v. Release of \(\mathrm{Ca}^{+2}\) from sarcoplasmic reticulum, increases sarcoplasmic \(\mathrm{Ca}^{+2}\) level
vi. Binding of \(\mathrm{Ca}^{+2}\) with troponin and masking activities removed

1 ii \(-\mathrm{i}-\mathrm{iii}-\mathrm{iv}-\mathrm{v}-\mathrm{vi}\)
2 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{ii}-\mathrm{i}\)
3 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{i}-\mathrm{ii}\)
4 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{i}-\mathrm{ii}-\mathrm{vi}\)
BIOXI20: LOCOMOTION AND MOVEMENT

340067 During muscle contraction

1 Size of sarcomere becomes smaller
2 Size of A- band increases
3 Size of I -band decreases
4 All the above
NEET DIGITAL LIBRARY
BIOXI20: LOCOMOTION AND MOVEMENT

340048 Which of the following actions is most likely to terminate an ongoing contraction of a skeletal muscle fibre?

1 Release of neurotransmitter at the neuromuscular junction
2 Increase in \(\mathrm{Ca}^{2+}\) concentration in sarcoplasm
3 Influx of \(\mathrm{Ca}^{2+}\) into the axon terminal at the neuromuscular junction
4 Removal of \(\mathrm{Ca}^{2+}\) from sarcoplasm
BIOXI20: LOCOMOTION AND MOVEMENT

340049 i. Number of mitochondria less.
ii. Number of mitochondria more
iii. Sarcoplasmic reticulum is abundant
iv. Myoglobin content high
v. Sarcoplasmic reticulum moderate
vi. Aerobic muscles
vii. Depend on anaerobic respiration for energy.
viii. Less myoglobin content
A. Red muscles  B. White muscles
Identify above (i to viii) traits as characteristic of \(A\) and \(B\) types of muscles

1 A-i, iii, vii, viii; B-ii, iv, v, vi
2 A-i, iii, iv, vii; B-ii, v, vi, viii
3 A-ii, iv, v, vi B-i, iii,vii, viii
4 A-ii, v, vi, viii; B-i, iii, iv, vii
BIOXI20: LOCOMOTION AND MOVEMENT

340050 Put the following phrases in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction.
i. Receptor sites on sarcolemma
ii. Nerve impulses.
iii. Release of \(\mathrm{Ca}^{2+}\) from sarcoplasmic reticulum
iv. The neurotransmitter acetylcholine is released
v. Sarcomere shortern
vi. Synaptic cleft
vii. Spread of impulses over sarcolemma on T-tubules

1 ii, iv, i, vi, vii, iii, v
2 i, ii, iii, iv, v, vi, vii
3 ii, iv, vi, i, vii, iii, v
4 vii, vi, v, iv, iii, ii, i
BIOXI20: LOCOMOTION AND MOVEMENT

340051 Read the following events occurred during muscle contraction, arrange them in correct sequence and select the correct option given below
i. Hydrolysis of ATP and formation of cross bridge
ii. During power stroke, thin filaments moves towards the centre of A band
iii. Release of Acetylcholine
iv. Generation of action potential in sarcolemma
v. Release of \(\mathrm{Ca}^{+2}\) from sarcoplasmic reticulum, increases sarcoplasmic \(\mathrm{Ca}^{+2}\) level
vi. Binding of \(\mathrm{Ca}^{+2}\) with troponin and masking activities removed

1 ii \(-\mathrm{i}-\mathrm{iii}-\mathrm{iv}-\mathrm{v}-\mathrm{vi}\)
2 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{ii}-\mathrm{i}\)
3 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{i}-\mathrm{ii}\)
4 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{i}-\mathrm{ii}-\mathrm{vi}\)
BIOXI20: LOCOMOTION AND MOVEMENT

340067 During muscle contraction

1 Size of sarcomere becomes smaller
2 Size of A- band increases
3 Size of I -band decreases
4 All the above
Join With Us for More Updates
BIOXI20: LOCOMOTION AND MOVEMENT

340048 Which of the following actions is most likely to terminate an ongoing contraction of a skeletal muscle fibre?

1 Release of neurotransmitter at the neuromuscular junction
2 Increase in \(\mathrm{Ca}^{2+}\) concentration in sarcoplasm
3 Influx of \(\mathrm{Ca}^{2+}\) into the axon terminal at the neuromuscular junction
4 Removal of \(\mathrm{Ca}^{2+}\) from sarcoplasm
BIOXI20: LOCOMOTION AND MOVEMENT

340049 i. Number of mitochondria less.
ii. Number of mitochondria more
iii. Sarcoplasmic reticulum is abundant
iv. Myoglobin content high
v. Sarcoplasmic reticulum moderate
vi. Aerobic muscles
vii. Depend on anaerobic respiration for energy.
viii. Less myoglobin content
A. Red muscles  B. White muscles
Identify above (i to viii) traits as characteristic of \(A\) and \(B\) types of muscles

1 A-i, iii, vii, viii; B-ii, iv, v, vi
2 A-i, iii, iv, vii; B-ii, v, vi, viii
3 A-ii, iv, v, vi B-i, iii,vii, viii
4 A-ii, v, vi, viii; B-i, iii, iv, vii
BIOXI20: LOCOMOTION AND MOVEMENT

340050 Put the following phrases in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction.
i. Receptor sites on sarcolemma
ii. Nerve impulses.
iii. Release of \(\mathrm{Ca}^{2+}\) from sarcoplasmic reticulum
iv. The neurotransmitter acetylcholine is released
v. Sarcomere shortern
vi. Synaptic cleft
vii. Spread of impulses over sarcolemma on T-tubules

1 ii, iv, i, vi, vii, iii, v
2 i, ii, iii, iv, v, vi, vii
3 ii, iv, vi, i, vii, iii, v
4 vii, vi, v, iv, iii, ii, i
BIOXI20: LOCOMOTION AND MOVEMENT

340051 Read the following events occurred during muscle contraction, arrange them in correct sequence and select the correct option given below
i. Hydrolysis of ATP and formation of cross bridge
ii. During power stroke, thin filaments moves towards the centre of A band
iii. Release of Acetylcholine
iv. Generation of action potential in sarcolemma
v. Release of \(\mathrm{Ca}^{+2}\) from sarcoplasmic reticulum, increases sarcoplasmic \(\mathrm{Ca}^{+2}\) level
vi. Binding of \(\mathrm{Ca}^{+2}\) with troponin and masking activities removed

1 ii \(-\mathrm{i}-\mathrm{iii}-\mathrm{iv}-\mathrm{v}-\mathrm{vi}\)
2 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{ii}-\mathrm{i}\)
3 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{vi}-\mathrm{i}-\mathrm{ii}\)
4 iii \(-\mathrm{iv}-\mathrm{v}-\mathrm{i}-\mathrm{ii}-\mathrm{vi}\)
BIOXI20: LOCOMOTION AND MOVEMENT

340067 During muscle contraction

1 Size of sarcomere becomes smaller
2 Size of A- band increases
3 Size of I -band decreases
4 All the above