Each Myosin filament is also a
1. Polymeric Protein
2. Monomeric Protein
3. Monomeric Glycoprotein
4. Polymeric Glycoprotein
Which of the following is a monomeric protein of thick filament?
1. Meromyosins
2. Macromyosins
3. Tropomyosin
4. Troponin
Each meromyosin has two
1. globular head with a short arm
2. Important part- HMM and LMM
3. Tails and one head
4. Short arms and one tail
The globular head is/has
1. An active ATPase enzyme
2. Binding sites for ATP
3. active sites for actin
4. All of these
Mechanism of muscle contraction is best explained by
1. Sliding Filament Theory
2. Sliding fibre theory
3. Sliding myofibre theory
4. Muscle sliding theory
Sliding Filament Theory states that
1. Contraction of muscle fibre takes place by the sliding of thin filaments over the thick filaments
2. Contraction of muscle fibre takes place by the sliding of thick filament over thin Filaments
3. Relaxation of muscle fibre takes place by the sliding of thick filament over thin filaments
4. Relaxation of muscle fibre takes place by the sliding of thin filament over thick filament
Muscle Contraction is initiated by
1. A signal sent by CNS via a motor neuron
2. A signal sent by PNS via a motor neuron
3. A signal sent by ANS via efferent neuron
4. A signal sent by ANS via efferent neuron
A neural signal reaching the neuromuscular junction releases …………. which generates an action potential in the ………..
1. Acetylcholine, Sarcolemma
2. Inositol, Sarcolemma
3. GABA, Sarcoplasmic reticulum
4. GABA, Sarcoplasm
The calcium ions released in sarcoplasm will bind to
1. Tropomyosin
2. Troponin
3. Actin
4. Meromyosin
The binding of troponin on actin Filaments actually masks the …..
1. Active site for Tropomyosin
2. Active site for ATP
3. Active site for Myosin
4. Active site for troponin