GENERAL HISTOLOGY

Detailed explanation-1: -Each bundle of muscle fiber is called a fasciculus and is surrounded by a layer of connective tissue called the perimysium . Within the fasciculus, each individual muscle cell, called a muscle fiber, is surrounded by connective tissue called the endomysium.

Detailed explanation-2: -Endomysium separates individual muscle fibers from each other. A motor neuron and the muscle fibers that it controls constitute a motor unit. In the initiation of muscle contraction, calcium ions bind to tropomyosin, exposing active sites on actin for cross-bridge formation.

Detailed explanation-3: -Answer and Explanation: The correct answer is (d): endomysium & perimysium. Each muscle fiber is wrapped within a connective tissue membrane known as endomysium, and muscle fibers are grouped together and wrapped within a connective tissue layer called perimysium to form a fascicle.

Detailed explanation-4: -All types of muscle have Endomysium covering individual muscle cells.-Skeletal muscles activity generate heat to help maintain body temperature.