How many Filaments are there in thin filament?
1. Two actin Filaments and two tropomyosin filaments
2. Two actin Filaments and one tropomyosin filaments
3. One actin filament and one tropomyosin filament
4. One actin and two tropomyosin filament

Subunit of troponin masks the
1. Active binding sites for Myosin on actin
2. Active binding sites for actin on Myosin
3. In resting state, active binding sites for Myosin on actin
4. In resting state, active binding sites for actin on Myosin

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