The correct answer to this question is A, Cryofibrogen. It is misspelled in the question and should be spelled cryofibrinogen. It is described as a heterogeneous group of proteins. As these proteins are cooled, they precipitate plasma. The proteins in Cryofibrinogen are both insoluble and cold. Cryofibrinogen is not comprised of proteins but is also made of fibrin and fibrin split products.
It can form in refrigerated plasma, but not in the refrigerated serum. Cryofibrinogenemia is a condition formed from arteries of the proteins. Symptoms of cryofibrinogenemia include ulcerations and livedo reticularis. It is also associated with other conditions like obstruction of the artic.
The correct answer is option A
Cryofibrinogen is the specimen that would need to be transported in ah heat block. Cryofibrinogen is a plasma precipitate that occurs in cool temperature and is soluble at room temperature.
BUN (Blood Urea Nitrogen) is formed by the liver and it is transported by the blood and excreted from the body through the kidneys.
Bilirubin is a yellow pigment that is produced in the breakdown of red blood cells. High level of bilirubin is known as hyperbilirubinemia.
PTT (Partial Thrombin Time) is a blood test that helps measure the integrity of intrinsic and common factors of the coagulation cascade.