340016
Statement A : On stimulation, a muscle cell releases calcium ions \(\left(\mathrm{Ca}^{2+}\right)\) from sarcoplasmic reticulum Statement B : By reacting with a protein complex, \(\mathrm{Ca}^{2+}\) uncover active sites on the myosin filaments.
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:
Increase in \(\mathrm{Ca}^{++}\)level leads to the binding of calcium with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin.
BIOXI20: LOCOMOTION AND MOVEMENT
340036
Motor end plate is a
1 Neuromuscular junction
2 Plate of motor neuron
3 Motor neuron
4 End of the motor neuron
Explanation:
The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.
BIOXI20: LOCOMOTION AND MOVEMENT
340017
The cross-bridges of the sarcomere in a skeletal muscle are made up of
1 Actin
2 Troponin
3 Light meromyosin
4 Heavy meromyosin
Explanation:
The head and short arm of a meromyosin are made up of heavy meromyosin. They project outwards at regular distance and angle from each other from the surface of a myosin filament and form a cross arm. They interact with the thin filament to form cross-bridges during muscle contraction.
BIOXI20: LOCOMOTION AND MOVEMENT
340018
Which of the following types of muscle fibres will be the first to undergo fatigue?
1 White muscle fibres
2 Cardiac muscle fibres
3 Red muscle fibres
4 Aerobic muscle fibres
Explanation:
White muscle fibres depend on the anaerobic process for energy and hence are fatigue-prone.
BIOXI20: LOCOMOTION AND MOVEMENT
340019
Stimulation of a muscle fibre by a motor neuron occurs at
1 The neuromuscular junction
2 Transverse tubules
3 The myofibril
4 The sacroplasmic reticulum
Explanation:
A motor neuron is a neuron that transmits stimulus to a muscle tissue. A muscle fibre along with the motor neuron that innervates muscle fibre forms a motor unit. Neuromuscular junction is formed by the axon terminals, motor end plate. Motor end plate is formed by nerve endings that lie beneath portion of sarcolemma.
340016
Statement A : On stimulation, a muscle cell releases calcium ions \(\left(\mathrm{Ca}^{2+}\right)\) from sarcoplasmic reticulum Statement B : By reacting with a protein complex, \(\mathrm{Ca}^{2+}\) uncover active sites on the myosin filaments.
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:
Increase in \(\mathrm{Ca}^{++}\)level leads to the binding of calcium with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin.
BIOXI20: LOCOMOTION AND MOVEMENT
340036
Motor end plate is a
1 Neuromuscular junction
2 Plate of motor neuron
3 Motor neuron
4 End of the motor neuron
Explanation:
The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.
BIOXI20: LOCOMOTION AND MOVEMENT
340017
The cross-bridges of the sarcomere in a skeletal muscle are made up of
1 Actin
2 Troponin
3 Light meromyosin
4 Heavy meromyosin
Explanation:
The head and short arm of a meromyosin are made up of heavy meromyosin. They project outwards at regular distance and angle from each other from the surface of a myosin filament and form a cross arm. They interact with the thin filament to form cross-bridges during muscle contraction.
BIOXI20: LOCOMOTION AND MOVEMENT
340018
Which of the following types of muscle fibres will be the first to undergo fatigue?
1 White muscle fibres
2 Cardiac muscle fibres
3 Red muscle fibres
4 Aerobic muscle fibres
Explanation:
White muscle fibres depend on the anaerobic process for energy and hence are fatigue-prone.
BIOXI20: LOCOMOTION AND MOVEMENT
340019
Stimulation of a muscle fibre by a motor neuron occurs at
1 The neuromuscular junction
2 Transverse tubules
3 The myofibril
4 The sacroplasmic reticulum
Explanation:
A motor neuron is a neuron that transmits stimulus to a muscle tissue. A muscle fibre along with the motor neuron that innervates muscle fibre forms a motor unit. Neuromuscular junction is formed by the axon terminals, motor end plate. Motor end plate is formed by nerve endings that lie beneath portion of sarcolemma.
340016
Statement A : On stimulation, a muscle cell releases calcium ions \(\left(\mathrm{Ca}^{2+}\right)\) from sarcoplasmic reticulum Statement B : By reacting with a protein complex, \(\mathrm{Ca}^{2+}\) uncover active sites on the myosin filaments.
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:
Increase in \(\mathrm{Ca}^{++}\)level leads to the binding of calcium with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin.
BIOXI20: LOCOMOTION AND MOVEMENT
340036
Motor end plate is a
1 Neuromuscular junction
2 Plate of motor neuron
3 Motor neuron
4 End of the motor neuron
Explanation:
The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.
BIOXI20: LOCOMOTION AND MOVEMENT
340017
The cross-bridges of the sarcomere in a skeletal muscle are made up of
1 Actin
2 Troponin
3 Light meromyosin
4 Heavy meromyosin
Explanation:
The head and short arm of a meromyosin are made up of heavy meromyosin. They project outwards at regular distance and angle from each other from the surface of a myosin filament and form a cross arm. They interact with the thin filament to form cross-bridges during muscle contraction.
BIOXI20: LOCOMOTION AND MOVEMENT
340018
Which of the following types of muscle fibres will be the first to undergo fatigue?
1 White muscle fibres
2 Cardiac muscle fibres
3 Red muscle fibres
4 Aerobic muscle fibres
Explanation:
White muscle fibres depend on the anaerobic process for energy and hence are fatigue-prone.
BIOXI20: LOCOMOTION AND MOVEMENT
340019
Stimulation of a muscle fibre by a motor neuron occurs at
1 The neuromuscular junction
2 Transverse tubules
3 The myofibril
4 The sacroplasmic reticulum
Explanation:
A motor neuron is a neuron that transmits stimulus to a muscle tissue. A muscle fibre along with the motor neuron that innervates muscle fibre forms a motor unit. Neuromuscular junction is formed by the axon terminals, motor end plate. Motor end plate is formed by nerve endings that lie beneath portion of sarcolemma.
340016
Statement A : On stimulation, a muscle cell releases calcium ions \(\left(\mathrm{Ca}^{2+}\right)\) from sarcoplasmic reticulum Statement B : By reacting with a protein complex, \(\mathrm{Ca}^{2+}\) uncover active sites on the myosin filaments.
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:
Increase in \(\mathrm{Ca}^{++}\)level leads to the binding of calcium with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin.
BIOXI20: LOCOMOTION AND MOVEMENT
340036
Motor end plate is a
1 Neuromuscular junction
2 Plate of motor neuron
3 Motor neuron
4 End of the motor neuron
Explanation:
The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.
BIOXI20: LOCOMOTION AND MOVEMENT
340017
The cross-bridges of the sarcomere in a skeletal muscle are made up of
1 Actin
2 Troponin
3 Light meromyosin
4 Heavy meromyosin
Explanation:
The head and short arm of a meromyosin are made up of heavy meromyosin. They project outwards at regular distance and angle from each other from the surface of a myosin filament and form a cross arm. They interact with the thin filament to form cross-bridges during muscle contraction.
BIOXI20: LOCOMOTION AND MOVEMENT
340018
Which of the following types of muscle fibres will be the first to undergo fatigue?
1 White muscle fibres
2 Cardiac muscle fibres
3 Red muscle fibres
4 Aerobic muscle fibres
Explanation:
White muscle fibres depend on the anaerobic process for energy and hence are fatigue-prone.
BIOXI20: LOCOMOTION AND MOVEMENT
340019
Stimulation of a muscle fibre by a motor neuron occurs at
1 The neuromuscular junction
2 Transverse tubules
3 The myofibril
4 The sacroplasmic reticulum
Explanation:
A motor neuron is a neuron that transmits stimulus to a muscle tissue. A muscle fibre along with the motor neuron that innervates muscle fibre forms a motor unit. Neuromuscular junction is formed by the axon terminals, motor end plate. Motor end plate is formed by nerve endings that lie beneath portion of sarcolemma.
340016
Statement A : On stimulation, a muscle cell releases calcium ions \(\left(\mathrm{Ca}^{2+}\right)\) from sarcoplasmic reticulum Statement B : By reacting with a protein complex, \(\mathrm{Ca}^{2+}\) uncover active sites on the myosin filaments.
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:
Increase in \(\mathrm{Ca}^{++}\)level leads to the binding of calcium with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin.
BIOXI20: LOCOMOTION AND MOVEMENT
340036
Motor end plate is a
1 Neuromuscular junction
2 Plate of motor neuron
3 Motor neuron
4 End of the motor neuron
Explanation:
The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.
BIOXI20: LOCOMOTION AND MOVEMENT
340017
The cross-bridges of the sarcomere in a skeletal muscle are made up of
1 Actin
2 Troponin
3 Light meromyosin
4 Heavy meromyosin
Explanation:
The head and short arm of a meromyosin are made up of heavy meromyosin. They project outwards at regular distance and angle from each other from the surface of a myosin filament and form a cross arm. They interact with the thin filament to form cross-bridges during muscle contraction.
BIOXI20: LOCOMOTION AND MOVEMENT
340018
Which of the following types of muscle fibres will be the first to undergo fatigue?
1 White muscle fibres
2 Cardiac muscle fibres
3 Red muscle fibres
4 Aerobic muscle fibres
Explanation:
White muscle fibres depend on the anaerobic process for energy and hence are fatigue-prone.
BIOXI20: LOCOMOTION AND MOVEMENT
340019
Stimulation of a muscle fibre by a motor neuron occurs at
1 The neuromuscular junction
2 Transverse tubules
3 The myofibril
4 The sacroplasmic reticulum
Explanation:
A motor neuron is a neuron that transmits stimulus to a muscle tissue. A muscle fibre along with the motor neuron that innervates muscle fibre forms a motor unit. Neuromuscular junction is formed by the axon terminals, motor end plate. Motor end plate is formed by nerve endings that lie beneath portion of sarcolemma.
