Skeletal and cardiac muscle cells are called striated because they show an alternating series of bands. The repeating arrangement of their basic contractile unit, the sacromere, produces these striations. In all types of muscle, contraction is caused by the movement of myosin filaments along actin filaments.
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Along with it, what structure connects the highlighted muscle cells to one another?
Still and all, which type of muscle cell lacks the highlighted striations? Smooth muscle cells
Nonetheless, what mechanism allows for a contraction of the highlighted cell?
The answer is sliding filament.
What cell type is highlighted?
44 Cards in this Set
Which tissue is highlighted?perichondrium
|Which structures are highlighted?||nuclei|
|which epithelial type is highlighted?||pseudostratified columnar epithelium|
|What is secreted by the highlighted cell?||mucin|
|pseudostratified columnar epithelium|
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All muscle tissues have 4 characteristics in common:
- extensibility - they can be stretched.
- elasticity - they return to normal length after stretching.
The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control.
Medical Definition of striation 1 : the fact or state of being striated. 2 : a minute groove, scratch, or channel especially when one of a parallel series. 3 : any of the alternate dark and light cross bands of a myofibril of striated muscle.
Terms in this set (7)Action potential generated, which stimulates muscle. ... Ca2+ released. ... Ca2+ binds to troponin, shifting the actin filaments, which exposes binding sites. ... Myosin cross bridges attach & detach, pulling actin filaments toward center (requires ATP) ... Muscle contracts.
The process of muscular contraction occurs over a number of key steps, including:
- Depolarisation and calcium ion release.
- Actin and myosin cross-bridge formation.
- Sliding mechanism of actin and myosin filaments.
- Sarcomere shortening (muscle contraction)
Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.
The highlighted structure (right atrium) receives deoxygenated blood from three vessels.
What's the function of the highlighted structure? produce saliva that helps moisten the oral cavity, kill bacteria in the mouth, and initiate the digestive process.
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The hypodermis is the innermost (or deepest) and thickest layer of skin. It is also known as the subcutaneous layer or subcutaneous tissue. The layers of the skin include the epidermis (the outermost layer), the dermis (the next layer which is loaded with blood vessels and nerves), and then the hypodermis.
- keratinocyte: The predominant cell type in the epidermis, the outermost layer of the skin, constituting 95% of the cells found there. ...
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