Muscular System of Humans

The certain drug acts at synapses and affects the action of neurotransmitter substances. The effects of four different drugs are given below:

Drug-I: Inhibits the enzyme cholinesterase.

Drug-II: Prevents the release of acetylcholine.

Drug-III: Competes with acetylcholine at receptor sites.

Drug-IV: Inhibits the enzyme which destroys nor-adrenaline.

Which two drugs would prevent a skeletal muscle from responding to an electrical stimulus of the presynaptic neuron?

Myoglobin helps in the transport of oxygen in _______.

All or none law is not applicable for

Muscle contains a red coloured oxygen storing pigment called

In muscle contraction, this ion is essential:

Which one of the following proteins does not play a role in skeletal muscle contraction?

When the muscle fibres get excited, triad allows releasing of which ions?

Fibrous membrane in the middle of a sarcomere is

Identify the correct order of stages in muscle contraction

Identify the part labelled as $\mathrm{B}$ in the above diagram of thin filament of a myofibril.

Following statement holds true for "Cori cycle"

A - band in skeletal muscle doesn't contain:

Fibrous membrane in the middle of sarcomere is

During muscle contraction, cross bridge is formed between :-

Which statement is correct regarding to structure of skeletal muscles?

Which formula represents correct sequence between two successive $\mathrm{H}-$zones.

Cardiac muscle is controlled by:-

In muscle fibre ${\mathrm{Ca}}^{++}$ ions are stored in

On the basis of below given diagram select the incorrect statement -

During contraction of muscle