HISTOLOGY
MUSCULAR TISSUE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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in the walls of a building
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in the walls of internal organs
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in the blood vessels
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in the walls of internal organs and blood vessels
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Detailed explanation-1: -Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control.
Detailed explanation-2: -In the cardiovascular system, smooth muscle is used in vessels to maintain blood pressure and flow; in the lungs, it opens and closes airways; in the gastrointestinal system it plays a role in motility and nutrition collection; and yet it still serves a purpose in almost every other organ system as well.
Detailed explanation-3: -Single-unit smooth muscle in the walls of the viscera, called visceral muscle, has a stress-relaxation response that permits muscle to stretch, contract, and relax as the organ expands.