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

The binding of calcium to troponin actually indicates
1. Unmasking of Myosin binding site over meromyosin
2. Unmasking of Myosin binding site over actin
3. Unmasking of actin binding site over Myosin
4. Unmasking of actin binding site over tropoiosin

During contraction of muscle fibres which of the following does not happen?
1. The length of A band gets reduced
2. The attached actin Filaments are pulled towards the centre of A band
3. The Z line attached to actin Filaments is pulled inward
4. Shortening of sarcomere

Which of the following step during sliding Filament Theory is the last step before relaxing state?
1. ATP utilization
2. Release of ADP and inorganic phosphate
3. Cross bridge formation
4. Binding of calcium with troponin

Which of the following property cannot be attributed with white fibres?
1. Less mitochondria
2. Anerobic process for energy
3. Sarcoplasmic reticulum is high
4. More quantity of myoglobin

1. Which of the following statements is wrong?
1. Bones and cartilages are specialised connective tissues
2. Skeletal system consists of a framework of more than hundred bones and cartilages
3. Bones have hard matrix due to calcium salt deposition
4. Cartilages have pliable matrix due to chondroitin salts

Which of the following is wrong with respect to Human skeleton?
1.Humans- 206 bones
2 Axial skeleton- 80 bones
3 Skull-24 bones
4 Ear ossicles- 6