Answer:
C) Release of von Willebrand factor (vWF) from the endothelium, not the epithelium.
Explanation:
Hemostasis is the physiological process of reparation and maintenance of a blood vessel to stop excess loss of blood in case of vascular injury. This process occurs in four stages:
- Vascular Injury i.e. a breach in the endothelial barrier. This results in the dislodge of endothelial cells, exposing the collagen fibers underneath.
- Vascular constriction or vasoconstriction is the constriction of the blood vessels to prevent excessive blood loss.
- Platelet plug formation involves the aggregation and adhesion of platelets to the endothelium.
- Coagulation
Platelet plug formation occurs by the adhesion of circulating platelets to the collagen fibers that have been exposed by dislodging of the endothelial cells. The endothelium, as well as the platelets release a ligand known as the von Willebrand factor (vWF). This molecule acts as a relay or bridge between the integrin receptors on the platelets and the exposed collagen fibers.
Platelets also release chemicals to attract more platelets to the wound site, resulting in more vWF release. This results in more and more platelets adhering to the endothelium, leading to platelet plug formation.
Answer:
YES
Explanation:
Here apply the formula for tangent of an angle to find height of the tree
Distance from house to tree is 100 ft = adjacent side
Tan ∅ = opposite side/adjacent side
Tan 46.4° = height of tree/100
h= 100 tan 46.4° = 105.01 ft
Given height of Emily is 5.5 ft, add this to 105.01 to find total height of the tree
=105.01 + 5.5 =110.51 ft
The tree is tall (110.51 ft) enough to hit her home which is 100 ft away from the tree.
Answer:
The first stage of cellular respiration, called glycolysis, takes place in the cytoplasm. In this step, enzymes split a molecule of glucose into two molecules of pyruvate, which releases energy that is transferred to ATP
Explanation:
They can learn bout their past and how evolution came to be and the size, weight, and details of when the fossil was alive
