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The walls of all the arteries are made up of smooth muscle cells.
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∙ 12y ago
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∙ 13y agotunica media
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What best describes the cells of unitary smooth muscle?
Smooth muscle is the involuntarily controlled muscle. In unitary smooth muscle, the cells are connected by gap junctions and are controlled by the autonomic nervous system and hormones.
What is the structure of an artery?
The walls of arteries are really thick; they consist of three cell layers. The inner layer is smooth, made of epithelial cells. Because of this smooth texture, it allows the blood that comes through it to flow more freely. The next layer is mostly composed of muscle tissue, and the outermost wall consists of flexible connective tissue. This structure of the artery makes it strong and flexible, and easy for it to pump the blood throughout your body.More Information:Similarly to the wider lumened vein, the artery has numerous structural features.Firstly the artery lumen is small. This is so a high pressure is maintained, and so the blood can flow quickly and efficiently to body tissues.Secondly the arteries wall is very thick. This is so the artery can withstand such high pressure from the narrow lumen. The wall is strengthened thanks to collagenfibres.Thirdly the lumen of the artery is surrounded by a layer of cells known as the endothelium. The endothelium is a thin layer and it simply reduces the friction of blood flow. The endothelium can also unfold.In addition the artery contains elastic tissue. The advantage of elastic tissue is that it can stretch and recoil. Recoil means that it can return the width of the lumen to it's original narrow size. The elastic tissue recoils when the heartbeat rests so high pressure is maintained. This can sometimes be observed on the skin when a vessel 'beats'.Furthermore the artery contains smooth muscle that constricts (narrows) as it contracts. This can be useful to improve gas exchange at the alveoli.
Can the heart contain smooth muscle?
No, they are not. Cardiac muscle is a type of involuntary striated muscle found only in the walls of the heart.This is a specialized muscle that, while similar in some fundamental ways to smooth muscle and skeletal muscle, has a unique structure and with an ability not possessed by muscle tissue elsewhere in the body. Cardiac muscle, like other muscles, can contract, but some of the cells have the ability to generate an action potential, known as cardiac muscle automaticity. Meaning that some of the cells can beat on their own without any nerve stimulation.
How does a blocked artery cause less oxygen to reach the heart?
Arteries carry blood, oxygenated by the lungs, to the cells of the body. Since the heart is a large muscle, its cells need oxygen too. When one of the arteries supplying the heart with oxygenated blood is blocked ("occluded") the oxygen cannot reach the cells supplied by that artery.
Why does death of heart muscle cells happen?
Many reasons - but most commonly due to a lack of oxygen secondary to blockage of a coronary artery.
What type of connective tissue contains spindle shaped cells?
Smooth muscle has this appearance. Because you don't seen that banding pattern (although it is there), it is given the name smooth muscle.
What type of muscle associated to the haert?
The heart contains cardiac muscle. This muscle is involuntary, like smooth muscle, but is made up of different types of cells from food muscle.
Which type of muscles contain spindle shaped cells?
Skeletal muscle tissue has cylindrical cells. Due to the cells in the skeletal muscle, the muscle can now allow movement to the bones in the body.
Is smooth muscle cells voluntary?
no, skeletal muscle cells are
What is the general shape of smooth muscle cells and plant fibers?
smooth muscle cells are spindle shaped
How are smooth muscle cells similar to skeletal fibers?
Smooth muscle cells are similar to skeletal muscle cells due to the actin-tropomyosin interactions. These interactions "tell" the muscle when to contract.
What best describes the cells of unitary smooth muscle?
Smooth muscle is the involuntarily controlled muscle. In unitary smooth muscle, the cells are connected by gap junctions and are controlled by the autonomic nervous system and hormones.
Which type of muscle is characterized by cells with tapered ends and a single nucleus?
Smooth muscle
What muscle cells consisting of a single nucleus are believed to be important for muscle hypertrophy?
smooth muscle cells
Which of these cells are likely to have multiple nuclei skeletal muscle cardiac muscle smooth muscle or neuron?
skeletal smooth muscle neuron
What muscle tissue spindle-shape cells?
Smooth Muscle
Do smooth muscle cells posses central nuclei but lack striations?
Smooth muscle is not striated, hence the name smooth muscle.nonotcardiac muscle
