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Doctor insights on: Cardiac Muscles Examples

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What are the examples of cardiac muscles?

What are the examples of cardiac muscles?

Heart: Cardiac muscles are special. They are unlike skeletal muscle (muscle in rest of the body) or smooth muscle that lines the walls of blood vessels. So to answer your question - example of cardiac muscle would be the heart. ...Read more

Muscle (Definition)

It is a body tissue that has the ability to contract. It shortens and generates force. It relaxes and returns to its original length. Muscles move joints, stabilize the body, move air and food through the organs, act as valves for bladder, bowel and other organs. They control movement of the eyes. They help us express ourselves by changing the shape of our ...Read more


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What is the function of cardiac muscle?

What is the function of cardiac muscle?

Myocardium: Its function is to rhythmically shorten and then relax so as to provide motive force to pump blood through the vascular system. ...Read more

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What is the function of cardiac muscle?

What is the function of cardiac muscle?

Pump blood: The heart muscle relaxes, and the chamber gets bigger and fills up with blood. The heart muscles squeezes and pumps blood out. (Valved in the heart make sure everything goes forward.) ...Read more

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Help please? What is the threshold voltage in cardiac muscle?

Help please? What is the threshold voltage in cardiac muscle?

Depends: It depends on which cardiac muscle tissue. In the SA node, its around -50 mv. In subsidiary pacemakers it can be as much as -90 mv. ...Read more

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Could there be more than one intercalated disc in a cardiac muscle cell?

Could there be more than one intercalated disc in a cardiac muscle cell?

No: Intercalated discs allow cardiac cells to join together. They're not really within a cardiac cell. Good luck on your exam or whatever it is that prompted you to ask this question. ...Read more

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Can you tell me the effects that a reduced cardiac output would have on the muscle cells of an athlete.?

Can you tell me the effects that a reduced cardiac output would have on the muscle cells of an athlete.?

Yes: When an athlete exercises to the point of their maximum cardiac output, their muscle cells convert from oxidative to anerobic metabolism with accumulation of Lactic Acid and development of oxygen debt - if CO is reduced, this will happen at a lower level of activity. Generally, one's days of competition are over. ...Read more

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Is cardiac muscle striated?

Is cardiac muscle striated?

There are 3 types of: Muscle, skeletal-compose of our muscle mass attach to the skeleton; smooth-located in the walls of hollow visceral organs except the heart; cardiac or striated. In practice, the term is sometimes used to refer exclusively to cardiac when distinguishing it from smooth muscle. Other dictionaries called striated muscle to skeletal muscle. Good question! ...Read more

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Why cardiac muscles do not exhibit lactic fermentation?

Why cardiac muscles do not exhibit lactic fermentation?

They would die...: Unlike skeletal muscle, which is generally used for short bursts of contraction, cardiac myocytes are specialized muscle cells that do not get "fatigued". That is because they are needed to continually be contracting, if they stopped, you would die. Lactic acidosis leads to muscle fatigue. In cardiac myocytes, hypoxia or low oxygen will, in fact, lead to cardiac lactic acidosis, e.g. Heart attack. ...Read more

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How does control of the contraction of skeletal muscles to the cardiac muscles happen?

Different: Cardiac muscle is different than skeletal muscle (arms, legs, back, etc). Skeletal muscle contracts when stimulated by the nerves that supply it. Heart muscle fires spontaneously as various electrolytes change concentration in the surrounding tissue. The area called the sinus node typically passes the threshold first thus firing the electrical impulse. This area is modulated by brain inputs. ...Read more

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What are the functions of cardiac muscle fibers?

What are the functions of cardiac muscle fibers?

See below: The heart is a muscle with very special qualities. The main bulk of heart muscle helps pump blood to the lungs to get oxygen and then pumps that oxygen rich blood to the rest of the body. Then there is a special type of cardiac fibers that helps conduct electrical impulses from two "pacemaker" sites in the heart, the sa and av nodes which allow the heart to keep pumping for your entire life. ...Read more

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Does the tachycardia affect cardiac muscles?

Does the tachycardia affect cardiac muscles?

Possibly: Prolonged periods of excessive heart rates can lead to weakening of the heart muscle (cardiomyopathy). It is important to identify causes of tachycardia and initiate treatment. ...Read more

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Can any doc tell me what's the function of your cardiac muscle?

Can any doc tell me what's the function of your cardiac muscle?

Heart is a muscle.: Cardiac muscle contracts and relaxes known as heart beats. This sends blood entering into the heart to flow out into major blood vessels; the thoracic aorta and the main pulmonary artery.

Blood from lungs enters heart via pulmonary veins and is pumped into the aorta delivering oxygen to body. Oxygen poor blood from body enters heart via vena cavae and pumped into lungs via pulmonary artery. ...Read more

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What is the difference between contractility and force of contraction of cardiac muscle?

What is the difference between contractility and force of contraction of cardiac muscle?

Contractility: Contractility is the property of how much the heart muscle can contract. Force of contraction is the actual force generated by the result of the contractility property. ...Read more

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What is the difference between "contractility" and "force of contraction" of cardiac muscle?

What is the difference between "contractility" and "force of contraction" of cardiac muscle?

Very complicated: This gets pretty nuanced! Contractility is a concept that refers to the inherent ability for heart muscle cells or the heart in general to develop a certain amount of force for the same given amount of stretch (preload) and load (afterload). Force of contraction is how hard the muscle or the heart is contracting no matter what the loading conditions are. ...Read more

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I was wondering what are the differences between cardiac (heart) and skeletal muscle contractile tissue?

I was wondering what are the differences between cardiac (heart) and skeletal muscle contractile tissue?

Cardiac vs Skeletal: It is difficult to describe in this limited space. Refer to the site:
http://www. Differencebetween. Net/science/health/difference-between-cardiac-and-skeletal-muscle/. ...Read more

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What is the mechanism by which smooth, skelatol and cardiac muscle twitch?

Depolarization: When you apply an electric current to any of the above fibers, you cause depolarization, ion flux, and movement of protein filaments resulting in the characteristic "twitch". If you're really interested, check out: http://www. Youtube. Com/watch? V=fduja8rwntk. ...Read more

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Does it right to take skeletal muscle relaxant for both muscle cardiac and skeletal?

Does it right to take skeletal muscle relaxant for both muscle cardiac and skeletal?

Only non cardiac: Skeletal muscle relaxants do not work on cardiac muscle which is autonomic controlled. These are used for muscle pain due to muscle stiffness. ...Read more

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What does hyper- and hyponatremia do to resting membrane potential of cardiac muscle?

What does hyper- and hyponatremia do to resting membrane potential of cardiac muscle?

Depends on K+...: Resting membrane potential is generated in phase 4, by k+ (potassium) ions. Na+ (sodium) channels are only active during phase 0 and are regulated by m, h and j gates. Because phase 4 is mainly controlled by k+ ions, the only way low or high na+ would affect this is in "ion homeostasis" (ih), via the n+/k+ pump. So if na+ was extremely high or low, and affected k+, it could potentially change it. ...Read more

Dr. John Landi
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Cardiac (Definition)

Cardiac translates literally to "heart, " and any place the term is seen, such ...Read more