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

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

Strongest muscles in human body are found in

Which yield $\mathrm{ATP}$ during muscle contraction?

Which of these statements about the molecular structure of myofilaments is true?

The long protein molecule, which masks the active sites on the $\mathrm{F}-$actin is

Which statement is correct for muscle contraction?

When a skeletal muscle shortens during contraction, which of these statements is false?

During muscle contraction

Striated muscles contract because of