Muscular System of Humans
Muscular System of Humans: Overview
This topic deals with the muscular system of humans including skeletal muscles, visceral muscles and cardiac muscles. We will also study the mechanism of actin and myosin with diagrammatic representations.
Important Questions on Muscular System of Humans
The muscles of the blood vessels, stomach and intestine are
Which of the following substances are absent and present in smooth muscle cells?
When the muscle fibres get excited, the triad allows releasing of ions.
Fill in the blank with the correct word given in the bracket.
There are two types of force-generating protein in a myofibril, i.e., actin and _____ (myosin/albumin).
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?
Fill in the blank with the correct option provided in the bracket.
A triad system in the skeletal muscle consists of one transverse _____ (tubule, vesicle, sac) and two terminal sarcoplasmic cisternae on either side.
Fibrous membrane in the middle of a sarcomere is
Identify the correct order of stages in muscle contraction
Identify the part labelled as in the above diagram of thin filament of a myofibril.
A - band in skeletal muscle doesn't contain:
Fibrous membrane in the middle of sarcomere is
The collagenous connective tissue layer holding the muscle bundles together is _____. (fascia/pleura/pericardium/sarcoplasm)
A sheath of connective tissue that wraps around several muscle bundles forming a muscle is called.
Strongest muscles in human body are found in
Which of these statements about the molecular structure of myofilaments is true?
The long protein molecule, which masks the active sites on the actin is
Which statement is correct for muscle contraction?
