Fibrin is an insoluble component of plasma that forms a meshwork of strands and is considered the structural basis of clot formation.
<h3>What is clot formation?</h3>
- Blood turns from a liquid to a gel during coagulation, which results in the formation of blood clots.
- Possible outcomes include haemostasis, which stops blood loss from a broken vessel, followed by repair.
- The activation, adhesion, and aggregation of platelets, as well as the deposition and maturation of fibrin, are all components of the coagulation process.
<h3>What is fibrin?</h3>
- A fibrous, non-globular protein called fibrin is necessary for blood to clot.
- It is created when fibrinogen undergoes polymerization due to the protease thrombin.
- A haemostatic plug or clot is formed over a wound site by platelets and polymerized fibrin.
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Answer: C; <em><u>Testes</u></em>
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Answer:
D) Pisum sativum (pea plant).
Explanation:
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Answer:
The prolonged electrical depolarization of cardiac muscle cells -that occurs during contraction- is due primarily to the persistent influx of calcium ion
Explanation:
The action potential of the heart muscle is longer with respect to skeletal muscle (around 300 milliseconds), and this is due to the activity of calcium (Ca⁺⁺ ) in the intracellular compartment.
The initial depolarization of cardiac muscle fiber depends on the entry of sodium (Na⁺) into the cell. However, for the action potential to occur and be maintained, Ca⁺⁺ must increase its cytoplasmic levels, which depends on:
- The increase in intracellular sodium induces the release of Ca⁺⁺ from the sarcoplasmic reticulum.
- Calcium entry from the extracellular space through the voltage dependent Ca⁺⁺ channels.
- The entry of extracellular Ca⁺⁺ causes the release of more Ca⁺⁺ ions by the sarcoplasmic reticulum, further increasing its intracellular concentration.
This is how the ion that guarantees the duration of the action potential of the cardiac muscle cell is the Ca⁺⁺.
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Calcium, sodium and cardiac muscle cells brainly.com/question/4473795
