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What else can I help you with?
What type of cells are found in the heart?
"I am not sure of names but i know that many cells make up the heart! Try to look on the Internet for your answer. Hope this helped a bit :)" You got to be kidding me... that wasn't helpful at all, but whatever. In the heart you can find: - Myocardiocytes - those are the cells performing the rhytmic contraction of the whole heart. - Endothelial cells - those are the supporting epithelial cells, insulating the chambers of the heart and the veins.
A quivering or spontaneous muscle contraction of the heart is called?
fibrillation
How are the cells in the biceps alike to the cells of the heart?
They are both made up of muscle cells. The heart is made of cardiac muscle, and the biceps are made of skeletal muscle.
What is cardiac muscle?
Cardiac muscle is a type of highly oxidative (using molecular oxygen to generate energy) involuntary striated muscle found in the walls of the heart, specifically the myocardium. Cardiac muscle cells are known as cardiac myocytes. Cardiac muscle is one of three major types of muscle, the others being skeletal and smooth muscle. The cells that comprise cardiac muscle are sometimes seen as intermediate between these two other types in terms of appearance, structure, metabolism, excitation-coupling and mechanism of contraction. Cardiac muscle shares similarities with skeletal muscle with regard to its striated appearance and contraction, with both differing significantly from smooth muscle cells. Coordinated contraction of cardiac muscle cells in the heart propel blood from the atria and ventricles to the blood vessels of the circulatory system. Cardiac muscle cells, like all tissues in the body, rely on an ample blood supply to deliver oxygen and nutrients and to remove waste products such as carbon dioxide. The coronary arteries fulfill this function
When are the atrioventricular valves closed?
During heart contraction
What muscle contains self excitable cells?
The heart muscle contains self-excitable cells known as pacemaker cells. These cells generate electrical signals that control the heart's rhythm by initiating the contraction of the heart muscle.
Where are the cells that initiate the stimulus for contraction of the heart muscle located?
SA node
What type of cells does the heart have?
The heart contains cardiac muscle cells. The cells are striated (the muscle fibers contain alternating light and dark bands). They differ from skeletal muscle in that it is an involuntary contraction, but they are similar in that they both have striations.
What structure allows for uniform contraction of the cardiac muscle?
The intercalated discs are specialized structures in cardiac muscle that allow for uniform contraction. They contain gap junctions, which allow for rapid electrical communication between cells, ensuring synchronous contraction of the heart muscle. Additionally, desmosomes in the intercalated discs help to physically link neighboring cardiac muscle cells, allowing for force transmission during contraction.
A group of conducting cells control heart muscle contraction and is known as the?
pacemaker cells
What cells make up the myocardium?
The myocardium is composed of cardiomyocytes, which are specialized muscle cells that form the heart muscle tissue. These cells are responsible for contraction of the heart and pumping blood throughout the body.
What are auto-rhythmic cells?
(pacemakers) refers to the cardiac muscle cells responsible for synchronizing the contractile cells to coordinate a heart contraction.
What effects do calcium slow channels have on shortening or lengthening the contraction time of the heart muscle?
Calcium slow channels play a crucial role in regulating the entry of calcium into cardiac muscle cells. Activation of these channels during the action potential leads to an influx of calcium, ultimately prolonging the duration of contraction in the heart muscle. Inhibition of these channels can lead to a decrease in contraction time by reducing the amount of calcium available for muscle contraction.
How do t-tubules contribute to the excitation-contraction coupling process in cardiac muscle?
T-tubules in cardiac muscle help transmit electrical signals deep into the muscle cells, allowing for synchronized contraction of the heart muscle. This process, known as excitation-contraction coupling, ensures that the heart beats effectively and efficiently.
What event stimulates the contraction of cardiac muscle?
The event that stimulates the contraction of cardiac muscle is the electrical signal generated by the sinoatrial (SA) node in the heart, also known as the pacemaker of the heart. This signal causes the heart muscle cells to contract and pump blood throughout the body.
What cell contains most mitochondria?
Muscle cells, such as those found in the heart or skeletal muscles, contain the most mitochondria as they require a lot of energy to function. Mitochondria are the powerhouse of the cell and are responsible for producing ATP, which is essential for muscle contraction.
What does auto-rhythmic mean?
Autorhythmic cells (pacemakers) refers to the cardiac muscle cells responsible for synchronizing the contractile cells to coordinate a heart contraction.
