NEET BIOLOGY

Detailed explanation-1: -Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts. The tissue is highly cellular and is well supplied with blood vessels.

Detailed explanation-2: -The motor neurons are linked to the muscle fibers at the neuromuscular junction. When this nervous signal reaches the neuromuscular junction the neurotransmitter called acetylcholine is released. This neurotransmitter binds to the receptors on the surface of the muscle fiber leading to muscular contraction.

Detailed explanation-3: -The muscles are those cells which can have the specialized function of contraction. The muscle cells have the ability to contract because of their structure.

Detailed explanation-4: -The strength of skeletal muscle contractions can be broadly separated into twitch, summation, and tetanus. A twitch is a single contraction and relaxation cycle produced by an action potential within the muscle fiber itself.

Detailed explanation-5: -Elastic myofilaments are composed of a springy form of anchoring protein known as titin. Together these myofilaments work to create muscle contractions by allowing the myosin protein heads to walk along the actin filaments creating a sliding action.